1e78042c77
Pointed-out-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
1097 lines
29 KiB
C
1097 lines
29 KiB
C
/*
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* arch/blackfin/kernel/setup.c
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*
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* Copyright 2004-2006 Analog Devices Inc.
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*
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* Enter bugs at http://blackfin.uclinux.org/
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/delay.h>
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#include <linux/console.h>
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#include <linux/bootmem.h>
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#include <linux/seq_file.h>
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#include <linux/cpu.h>
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#include <linux/module.h>
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#include <linux/tty.h>
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#include <linux/pfn.h>
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#include <linux/ext2_fs.h>
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#include <linux/cramfs_fs.h>
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#include <linux/romfs_fs.h>
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#include <asm/cplb.h>
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#include <asm/cacheflush.h>
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#include <asm/blackfin.h>
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#include <asm/cplbinit.h>
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#include <asm/div64.h>
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#include <asm/fixed_code.h>
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#include <asm/early_printk.h>
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static DEFINE_PER_CPU(struct cpu, cpu_devices);
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u16 _bfin_swrst;
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EXPORT_SYMBOL(_bfin_swrst);
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unsigned long memory_start, memory_end, physical_mem_end;
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unsigned long _rambase, _ramstart, _ramend;
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unsigned long reserved_mem_dcache_on;
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unsigned long reserved_mem_icache_on;
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EXPORT_SYMBOL(memory_start);
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EXPORT_SYMBOL(memory_end);
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EXPORT_SYMBOL(physical_mem_end);
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EXPORT_SYMBOL(_ramend);
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#ifdef CONFIG_MTD_UCLINUX
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unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
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unsigned long _ebss;
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EXPORT_SYMBOL(memory_mtd_end);
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EXPORT_SYMBOL(memory_mtd_start);
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EXPORT_SYMBOL(mtd_size);
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#endif
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char __initdata command_line[COMMAND_LINE_SIZE];
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/* boot memmap, for parsing "memmap=" */
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#define BFIN_MEMMAP_MAX 128 /* number of entries in bfin_memmap */
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#define BFIN_MEMMAP_RAM 1
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#define BFIN_MEMMAP_RESERVED 2
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struct bfin_memmap {
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int nr_map;
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struct bfin_memmap_entry {
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unsigned long long addr; /* start of memory segment */
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unsigned long long size;
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unsigned long type;
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} map[BFIN_MEMMAP_MAX];
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} bfin_memmap __initdata;
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/* for memmap sanitization */
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struct change_member {
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struct bfin_memmap_entry *pentry; /* pointer to original entry */
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unsigned long long addr; /* address for this change point */
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};
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static struct change_member change_point_list[2*BFIN_MEMMAP_MAX] __initdata;
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static struct change_member *change_point[2*BFIN_MEMMAP_MAX] __initdata;
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static struct bfin_memmap_entry *overlap_list[BFIN_MEMMAP_MAX] __initdata;
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static struct bfin_memmap_entry new_map[BFIN_MEMMAP_MAX] __initdata;
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void __init bf53x_cache_init(void)
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{
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#if defined(CONFIG_BFIN_DCACHE) || defined(CONFIG_BFIN_ICACHE)
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generate_cpl_tables();
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#endif
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#ifdef CONFIG_BFIN_ICACHE
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bfin_icache_init();
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printk(KERN_INFO "Instruction Cache Enabled\n");
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#endif
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#ifdef CONFIG_BFIN_DCACHE
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bfin_dcache_init();
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printk(KERN_INFO "Data Cache Enabled"
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# if defined CONFIG_BFIN_WB
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" (write-back)"
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# elif defined CONFIG_BFIN_WT
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" (write-through)"
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# endif
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"\n");
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#endif
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}
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void __init bf53x_relocate_l1_mem(void)
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{
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unsigned long l1_code_length;
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unsigned long l1_data_a_length;
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unsigned long l1_data_b_length;
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l1_code_length = _etext_l1 - _stext_l1;
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if (l1_code_length > L1_CODE_LENGTH)
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panic("L1 Instruction SRAM Overflow\n");
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/* cannot complain as printk is not available as yet.
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* But we can continue booting and complain later!
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*/
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/* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */
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dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length);
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l1_data_a_length = _ebss_l1 - _sdata_l1;
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if (l1_data_a_length > L1_DATA_A_LENGTH)
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panic("L1 Data SRAM Bank A Overflow\n");
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/* Copy _sdata_l1 to _ebss_l1 to L1 data bank A SRAM */
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dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length);
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l1_data_b_length = _ebss_b_l1 - _sdata_b_l1;
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if (l1_data_b_length > L1_DATA_B_LENGTH)
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panic("L1 Data SRAM Bank B Overflow\n");
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/* Copy _sdata_b_l1 to _ebss_b_l1 to L1 data bank B SRAM */
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dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length +
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l1_data_a_length, l1_data_b_length);
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}
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/* add_memory_region to memmap */
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static void __init add_memory_region(unsigned long long start,
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unsigned long long size, int type)
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{
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int i;
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i = bfin_memmap.nr_map;
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if (i == BFIN_MEMMAP_MAX) {
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printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
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return;
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}
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bfin_memmap.map[i].addr = start;
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bfin_memmap.map[i].size = size;
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bfin_memmap.map[i].type = type;
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bfin_memmap.nr_map++;
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}
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/*
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* Sanitize the boot memmap, removing overlaps.
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*/
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static int __init sanitize_memmap(struct bfin_memmap_entry *map, int *pnr_map)
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{
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struct change_member *change_tmp;
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unsigned long current_type, last_type;
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unsigned long long last_addr;
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int chgidx, still_changing;
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int overlap_entries;
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int new_entry;
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int old_nr, new_nr, chg_nr;
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int i;
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/*
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Visually we're performing the following (1,2,3,4 = memory types)
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Sample memory map (w/overlaps):
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____22__________________
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______________________4_
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____1111________________
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_44_____________________
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11111111________________
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____________________33__
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___________44___________
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__________33333_________
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______________22________
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___________________2222_
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_________111111111______
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_____________________11_
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_________________4______
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Sanitized equivalent (no overlap):
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1_______________________
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_44_____________________
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___1____________________
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____22__________________
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______11________________
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_________1______________
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__________3_____________
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___________44___________
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_____________33_________
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_______________2________
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________________1_______
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_________________4______
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___________________2____
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____________________33__
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______________________4_
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*/
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/* if there's only one memory region, don't bother */
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if (*pnr_map < 2)
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return -1;
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old_nr = *pnr_map;
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/* bail out if we find any unreasonable addresses in memmap */
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for (i = 0; i < old_nr; i++)
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if (map[i].addr + map[i].size < map[i].addr)
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return -1;
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/* create pointers for initial change-point information (for sorting) */
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for (i = 0; i < 2*old_nr; i++)
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change_point[i] = &change_point_list[i];
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/* record all known change-points (starting and ending addresses),
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omitting those that are for empty memory regions */
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chgidx = 0;
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for (i = 0; i < old_nr; i++) {
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if (map[i].size != 0) {
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change_point[chgidx]->addr = map[i].addr;
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change_point[chgidx++]->pentry = &map[i];
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change_point[chgidx]->addr = map[i].addr + map[i].size;
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change_point[chgidx++]->pentry = &map[i];
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}
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}
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chg_nr = chgidx; /* true number of change-points */
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/* sort change-point list by memory addresses (low -> high) */
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still_changing = 1;
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while (still_changing) {
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still_changing = 0;
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for (i = 1; i < chg_nr; i++) {
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/* if <current_addr> > <last_addr>, swap */
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/* or, if current=<start_addr> & last=<end_addr>, swap */
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if ((change_point[i]->addr < change_point[i-1]->addr) ||
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((change_point[i]->addr == change_point[i-1]->addr) &&
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(change_point[i]->addr == change_point[i]->pentry->addr) &&
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(change_point[i-1]->addr != change_point[i-1]->pentry->addr))
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) {
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change_tmp = change_point[i];
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change_point[i] = change_point[i-1];
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change_point[i-1] = change_tmp;
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still_changing = 1;
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}
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}
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}
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/* create a new memmap, removing overlaps */
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overlap_entries = 0; /* number of entries in the overlap table */
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new_entry = 0; /* index for creating new memmap entries */
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last_type = 0; /* start with undefined memory type */
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last_addr = 0; /* start with 0 as last starting address */
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/* loop through change-points, determining affect on the new memmap */
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for (chgidx = 0; chgidx < chg_nr; chgidx++) {
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/* keep track of all overlapping memmap entries */
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if (change_point[chgidx]->addr == change_point[chgidx]->pentry->addr) {
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/* add map entry to overlap list (> 1 entry implies an overlap) */
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overlap_list[overlap_entries++] = change_point[chgidx]->pentry;
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} else {
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/* remove entry from list (order independent, so swap with last) */
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for (i = 0; i < overlap_entries; i++) {
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if (overlap_list[i] == change_point[chgidx]->pentry)
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overlap_list[i] = overlap_list[overlap_entries-1];
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}
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overlap_entries--;
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}
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/* if there are overlapping entries, decide which "type" to use */
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/* (larger value takes precedence -- 1=usable, 2,3,4,4+=unusable) */
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current_type = 0;
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for (i = 0; i < overlap_entries; i++)
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if (overlap_list[i]->type > current_type)
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current_type = overlap_list[i]->type;
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/* continue building up new memmap based on this information */
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if (current_type != last_type) {
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if (last_type != 0) {
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new_map[new_entry].size =
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change_point[chgidx]->addr - last_addr;
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/* move forward only if the new size was non-zero */
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if (new_map[new_entry].size != 0)
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if (++new_entry >= BFIN_MEMMAP_MAX)
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break; /* no more space left for new entries */
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}
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if (current_type != 0) {
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new_map[new_entry].addr = change_point[chgidx]->addr;
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new_map[new_entry].type = current_type;
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last_addr = change_point[chgidx]->addr;
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}
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last_type = current_type;
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}
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}
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new_nr = new_entry; /* retain count for new entries */
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/* copy new mapping into original location */
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memcpy(map, new_map, new_nr*sizeof(struct bfin_memmap_entry));
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*pnr_map = new_nr;
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return 0;
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}
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static void __init print_memory_map(char *who)
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{
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int i;
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for (i = 0; i < bfin_memmap.nr_map; i++) {
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printk(KERN_DEBUG " %s: %016Lx - %016Lx ", who,
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bfin_memmap.map[i].addr,
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bfin_memmap.map[i].addr + bfin_memmap.map[i].size);
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switch (bfin_memmap.map[i].type) {
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case BFIN_MEMMAP_RAM:
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printk("(usable)\n");
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break;
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case BFIN_MEMMAP_RESERVED:
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printk("(reserved)\n");
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break;
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default: printk("type %lu\n", bfin_memmap.map[i].type);
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break;
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}
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}
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}
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static __init int parse_memmap(char *arg)
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{
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unsigned long long start_at, mem_size;
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if (!arg)
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return -EINVAL;
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mem_size = memparse(arg, &arg);
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if (*arg == '@') {
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start_at = memparse(arg+1, &arg);
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add_memory_region(start_at, mem_size, BFIN_MEMMAP_RAM);
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} else if (*arg == '$') {
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start_at = memparse(arg+1, &arg);
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add_memory_region(start_at, mem_size, BFIN_MEMMAP_RESERVED);
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}
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return 0;
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}
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/*
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* Initial parsing of the command line. Currently, we support:
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* - Controlling the linux memory size: mem=xxx[KMG]
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* - Controlling the physical memory size: max_mem=xxx[KMG][$][#]
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* $ -> reserved memory is dcacheable
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* # -> reserved memory is icacheable
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* - "memmap=XXX[KkmM][@][$]XXX[KkmM]" defines a memory region
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* @ from <start> to <start>+<mem>, type RAM
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* $ from <start> to <start>+<mem>, type RESERVED
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*
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*/
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static __init void parse_cmdline_early(char *cmdline_p)
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{
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char c = ' ', *to = cmdline_p;
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unsigned int memsize;
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for (;;) {
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if (c == ' ') {
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if (!memcmp(to, "mem=", 4)) {
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to += 4;
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memsize = memparse(to, &to);
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if (memsize)
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_ramend = memsize;
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} else if (!memcmp(to, "max_mem=", 8)) {
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to += 8;
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memsize = memparse(to, &to);
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if (memsize) {
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physical_mem_end = memsize;
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if (*to != ' ') {
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if (*to == '$'
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|| *(to + 1) == '$')
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reserved_mem_dcache_on =
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1;
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if (*to == '#'
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|| *(to + 1) == '#')
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reserved_mem_icache_on =
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1;
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}
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}
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} else if (!memcmp(to, "earlyprintk=", 12)) {
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to += 12;
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setup_early_printk(to);
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} else if (!memcmp(to, "memmap=", 7)) {
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to += 7;
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parse_memmap(to);
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}
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}
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c = *(to++);
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if (!c)
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break;
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}
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}
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/*
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* Setup memory defaults from user config.
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* The physical memory layout looks like:
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*
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* [_rambase, _ramstart]: kernel image
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* [memory_start, memory_end]: dynamic memory managed by kernel
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* [memory_end, _ramend]: reserved memory
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* [meory_mtd_start(memory_end),
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* memory_mtd_start + mtd_size]: rootfs (if any)
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* [_ramend - DMA_UNCACHED_REGION,
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* _ramend]: uncached DMA region
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* [_ramend, physical_mem_end]: memory not managed by kernel
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*
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*/
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static __init void memory_setup(void)
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{
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#ifdef CONFIG_MTD_UCLINUX
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unsigned long mtd_phys = 0;
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#endif
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_rambase = (unsigned long)_stext;
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_ramstart = (unsigned long)_end;
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if (DMA_UNCACHED_REGION > (_ramend - _ramstart)) {
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console_init();
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panic("DMA region exceeds memory limit: %lu.\n",
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_ramend - _ramstart);
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}
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memory_end = _ramend - DMA_UNCACHED_REGION;
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#ifdef CONFIG_MPU
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/* Round up to multiple of 4MB. */
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memory_start = (_ramstart + 0x3fffff) & ~0x3fffff;
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#else
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memory_start = PAGE_ALIGN(_ramstart);
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#endif
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#if defined(CONFIG_MTD_UCLINUX)
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/* generic memory mapped MTD driver */
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memory_mtd_end = memory_end;
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mtd_phys = _ramstart;
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mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 8)));
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# if defined(CONFIG_EXT2_FS) || defined(CONFIG_EXT3_FS)
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if (*((unsigned short *)(mtd_phys + 0x438)) == EXT2_SUPER_MAGIC)
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mtd_size =
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PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x404)) << 10);
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# endif
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# if defined(CONFIG_CRAMFS)
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if (*((unsigned long *)(mtd_phys)) == CRAMFS_MAGIC)
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mtd_size = PAGE_ALIGN(*((unsigned long *)(mtd_phys + 0x4)));
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# endif
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# if defined(CONFIG_ROMFS_FS)
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if (((unsigned long *)mtd_phys)[0] == ROMSB_WORD0
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&& ((unsigned long *)mtd_phys)[1] == ROMSB_WORD1)
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mtd_size =
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PAGE_ALIGN(be32_to_cpu(((unsigned long *)mtd_phys)[2]));
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# if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
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/* Due to a Hardware Anomaly we need to limit the size of usable
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* instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
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* 05000263 - Hardware loop corrupted when taking an ICPLB exception
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*/
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# if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
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if (memory_end >= 56 * 1024 * 1024)
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memory_end = 56 * 1024 * 1024;
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# else
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if (memory_end >= 60 * 1024 * 1024)
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memory_end = 60 * 1024 * 1024;
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# endif /* CONFIG_DEBUG_HUNT_FOR_ZERO */
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# endif /* ANOMALY_05000263 */
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# endif /* CONFIG_ROMFS_FS */
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memory_end -= mtd_size;
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if (mtd_size == 0) {
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console_init();
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panic("Don't boot kernel without rootfs attached.\n");
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}
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/* Relocate MTD image to the top of memory after the uncached memory area */
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dma_memcpy((char *)memory_end, _end, mtd_size);
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memory_mtd_start = memory_end;
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_ebss = memory_mtd_start; /* define _ebss for compatible */
|
|
#endif /* CONFIG_MTD_UCLINUX */
|
|
|
|
#if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)
|
|
/* Due to a Hardware Anomaly we need to limit the size of usable
|
|
* instruction memory to max 60MB, 56 if HUNT_FOR_ZERO is on
|
|
* 05000263 - Hardware loop corrupted when taking an ICPLB exception
|
|
*/
|
|
#if (defined(CONFIG_DEBUG_HUNT_FOR_ZERO))
|
|
if (memory_end >= 56 * 1024 * 1024)
|
|
memory_end = 56 * 1024 * 1024;
|
|
#else
|
|
if (memory_end >= 60 * 1024 * 1024)
|
|
memory_end = 60 * 1024 * 1024;
|
|
#endif /* CONFIG_DEBUG_HUNT_FOR_ZERO */
|
|
printk(KERN_NOTICE "Warning: limiting memory to %liMB due to hardware anomaly 05000263\n", memory_end >> 20);
|
|
#endif /* ANOMALY_05000263 */
|
|
|
|
#ifdef CONFIG_MPU
|
|
page_mask_nelts = ((_ramend >> PAGE_SHIFT) + 31) / 32;
|
|
page_mask_order = get_order(3 * page_mask_nelts * sizeof(long));
|
|
#endif
|
|
|
|
#if !defined(CONFIG_MTD_UCLINUX)
|
|
/*In case there is no valid CPLB behind memory_end make sure we don't get to close*/
|
|
memory_end -= SIZE_4K;
|
|
#endif
|
|
|
|
init_mm.start_code = (unsigned long)_stext;
|
|
init_mm.end_code = (unsigned long)_etext;
|
|
init_mm.end_data = (unsigned long)_edata;
|
|
init_mm.brk = (unsigned long)0;
|
|
|
|
printk(KERN_INFO "Board Memory: %ldMB\n", physical_mem_end >> 20);
|
|
printk(KERN_INFO "Kernel Managed Memory: %ldMB\n", _ramend >> 20);
|
|
|
|
printk(KERN_INFO "Memory map:\n"
|
|
KERN_INFO " fixedcode = 0x%p-0x%p\n"
|
|
KERN_INFO " text = 0x%p-0x%p\n"
|
|
KERN_INFO " rodata = 0x%p-0x%p\n"
|
|
KERN_INFO " bss = 0x%p-0x%p\n"
|
|
KERN_INFO " data = 0x%p-0x%p\n"
|
|
KERN_INFO " stack = 0x%p-0x%p\n"
|
|
KERN_INFO " init = 0x%p-0x%p\n"
|
|
KERN_INFO " available = 0x%p-0x%p\n"
|
|
#ifdef CONFIG_MTD_UCLINUX
|
|
KERN_INFO " rootfs = 0x%p-0x%p\n"
|
|
#endif
|
|
#if DMA_UNCACHED_REGION > 0
|
|
KERN_INFO " DMA Zone = 0x%p-0x%p\n"
|
|
#endif
|
|
, (void *)FIXED_CODE_START, (void *)FIXED_CODE_END,
|
|
_stext, _etext,
|
|
__start_rodata, __end_rodata,
|
|
__bss_start, __bss_stop,
|
|
_sdata, _edata,
|
|
(void *)&init_thread_union,
|
|
(void *)((int)(&init_thread_union) + 0x2000),
|
|
__init_begin, __init_end,
|
|
(void *)_ramstart, (void *)memory_end
|
|
#ifdef CONFIG_MTD_UCLINUX
|
|
, (void *)memory_mtd_start, (void *)(memory_mtd_start + mtd_size)
|
|
#endif
|
|
#if DMA_UNCACHED_REGION > 0
|
|
, (void *)(_ramend - DMA_UNCACHED_REGION), (void *)(_ramend)
|
|
#endif
|
|
);
|
|
}
|
|
|
|
/*
|
|
* Find the lowest, highest page frame number we have available
|
|
*/
|
|
void __init find_min_max_pfn(void)
|
|
{
|
|
int i;
|
|
|
|
max_pfn = 0;
|
|
min_low_pfn = memory_end;
|
|
|
|
for (i = 0; i < bfin_memmap.nr_map; i++) {
|
|
unsigned long start, end;
|
|
/* RAM? */
|
|
if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM)
|
|
continue;
|
|
start = PFN_UP(bfin_memmap.map[i].addr);
|
|
end = PFN_DOWN(bfin_memmap.map[i].addr +
|
|
bfin_memmap.map[i].size);
|
|
if (start >= end)
|
|
continue;
|
|
if (end > max_pfn)
|
|
max_pfn = end;
|
|
if (start < min_low_pfn)
|
|
min_low_pfn = start;
|
|
}
|
|
}
|
|
|
|
static __init void setup_bootmem_allocator(void)
|
|
{
|
|
int bootmap_size;
|
|
int i;
|
|
unsigned long start_pfn, end_pfn;
|
|
unsigned long curr_pfn, last_pfn, size;
|
|
|
|
/* mark memory between memory_start and memory_end usable */
|
|
add_memory_region(memory_start,
|
|
memory_end - memory_start, BFIN_MEMMAP_RAM);
|
|
/* sanity check for overlap */
|
|
sanitize_memmap(bfin_memmap.map, &bfin_memmap.nr_map);
|
|
print_memory_map("boot memmap");
|
|
|
|
/* intialize globals in linux/bootmem.h */
|
|
find_min_max_pfn();
|
|
/* pfn of the last usable page frame */
|
|
if (max_pfn > memory_end >> PAGE_SHIFT)
|
|
max_pfn = memory_end >> PAGE_SHIFT;
|
|
/* pfn of last page frame directly mapped by kernel */
|
|
max_low_pfn = max_pfn;
|
|
/* pfn of the first usable page frame after kernel image*/
|
|
if (min_low_pfn < memory_start >> PAGE_SHIFT)
|
|
min_low_pfn = memory_start >> PAGE_SHIFT;
|
|
|
|
start_pfn = PAGE_OFFSET >> PAGE_SHIFT;
|
|
end_pfn = memory_end >> PAGE_SHIFT;
|
|
|
|
/*
|
|
* give all the memory to the bootmap allocator, tell it to put the
|
|
* boot mem_map at the start of memory.
|
|
*/
|
|
bootmap_size = init_bootmem_node(NODE_DATA(0),
|
|
memory_start >> PAGE_SHIFT, /* map goes here */
|
|
start_pfn, end_pfn);
|
|
|
|
/* register the memmap regions with the bootmem allocator */
|
|
for (i = 0; i < bfin_memmap.nr_map; i++) {
|
|
/*
|
|
* Reserve usable memory
|
|
*/
|
|
if (bfin_memmap.map[i].type != BFIN_MEMMAP_RAM)
|
|
continue;
|
|
/*
|
|
* We are rounding up the start address of usable memory:
|
|
*/
|
|
curr_pfn = PFN_UP(bfin_memmap.map[i].addr);
|
|
if (curr_pfn >= end_pfn)
|
|
continue;
|
|
/*
|
|
* ... and at the end of the usable range downwards:
|
|
*/
|
|
last_pfn = PFN_DOWN(bfin_memmap.map[i].addr +
|
|
bfin_memmap.map[i].size);
|
|
|
|
if (last_pfn > end_pfn)
|
|
last_pfn = end_pfn;
|
|
|
|
/*
|
|
* .. finally, did all the rounding and playing
|
|
* around just make the area go away?
|
|
*/
|
|
if (last_pfn <= curr_pfn)
|
|
continue;
|
|
|
|
size = last_pfn - curr_pfn;
|
|
free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
|
|
}
|
|
|
|
/* reserve memory before memory_start, including bootmap */
|
|
reserve_bootmem(PAGE_OFFSET,
|
|
memory_start + bootmap_size + PAGE_SIZE - 1 - PAGE_OFFSET,
|
|
BOOTMEM_DEFAULT);
|
|
}
|
|
|
|
#define EBSZ_TO_MEG(ebsz) \
|
|
({ \
|
|
int meg = 0; \
|
|
switch (ebsz & 0xf) { \
|
|
case 0x1: meg = 16; break; \
|
|
case 0x3: meg = 32; break; \
|
|
case 0x5: meg = 64; break; \
|
|
case 0x7: meg = 128; break; \
|
|
case 0x9: meg = 256; break; \
|
|
case 0xb: meg = 512; break; \
|
|
} \
|
|
meg; \
|
|
})
|
|
static inline int __init get_mem_size(void)
|
|
{
|
|
#ifdef CONFIG_MEM_SIZE
|
|
return CONFIG_MEM_SIZE;
|
|
#else
|
|
# if defined(EBIU_SDBCTL)
|
|
# if defined(BF561_FAMILY)
|
|
int ret = 0;
|
|
u32 sdbctl = bfin_read_EBIU_SDBCTL();
|
|
ret += EBSZ_TO_MEG(sdbctl >> 0);
|
|
ret += EBSZ_TO_MEG(sdbctl >> 8);
|
|
ret += EBSZ_TO_MEG(sdbctl >> 16);
|
|
ret += EBSZ_TO_MEG(sdbctl >> 24);
|
|
return ret;
|
|
# else
|
|
return EBSZ_TO_MEG(bfin_read_EBIU_SDBCTL());
|
|
# endif
|
|
# elif defined(EBIU_DDRCTL1)
|
|
u32 ddrctl = bfin_read_EBIU_DDRCTL1();
|
|
int ret = 0;
|
|
switch (ddrctl & 0xc0000) {
|
|
case DEVSZ_64: ret = 64 / 8;
|
|
case DEVSZ_128: ret = 128 / 8;
|
|
case DEVSZ_256: ret = 256 / 8;
|
|
case DEVSZ_512: ret = 512 / 8;
|
|
}
|
|
switch (ddrctl & 0x30000) {
|
|
case DEVWD_4: ret *= 2;
|
|
case DEVWD_8: ret *= 2;
|
|
case DEVWD_16: break;
|
|
}
|
|
return ret;
|
|
# endif
|
|
#endif
|
|
BUG();
|
|
}
|
|
|
|
void __init setup_arch(char **cmdline_p)
|
|
{
|
|
unsigned long sclk, cclk;
|
|
|
|
#ifdef CONFIG_DUMMY_CONSOLE
|
|
conswitchp = &dummy_con;
|
|
#endif
|
|
|
|
#if defined(CONFIG_CMDLINE_BOOL)
|
|
strncpy(&command_line[0], CONFIG_CMDLINE, sizeof(command_line));
|
|
command_line[sizeof(command_line) - 1] = 0;
|
|
#endif
|
|
|
|
/* Keep a copy of command line */
|
|
*cmdline_p = &command_line[0];
|
|
memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
|
|
boot_command_line[COMMAND_LINE_SIZE - 1] = '\0';
|
|
|
|
/* setup memory defaults from the user config */
|
|
physical_mem_end = 0;
|
|
_ramend = get_mem_size() * 1024 * 1024;
|
|
|
|
memset(&bfin_memmap, 0, sizeof(bfin_memmap));
|
|
|
|
parse_cmdline_early(&command_line[0]);
|
|
|
|
if (physical_mem_end == 0)
|
|
physical_mem_end = _ramend;
|
|
|
|
memory_setup();
|
|
|
|
cclk = get_cclk();
|
|
sclk = get_sclk();
|
|
|
|
#if !defined(CONFIG_BFIN_KERNEL_CLOCK)
|
|
if (ANOMALY_05000273 && cclk == sclk)
|
|
panic("ANOMALY 05000273, SCLK can not be same as CCLK");
|
|
#endif
|
|
|
|
#ifdef BF561_FAMILY
|
|
if (ANOMALY_05000266) {
|
|
bfin_read_IMDMA_D0_IRQ_STATUS();
|
|
bfin_read_IMDMA_D1_IRQ_STATUS();
|
|
}
|
|
#endif
|
|
printk(KERN_INFO "Hardware Trace ");
|
|
if (bfin_read_TBUFCTL() & 0x1)
|
|
printk("Active ");
|
|
else
|
|
printk("Off ");
|
|
if (bfin_read_TBUFCTL() & 0x2)
|
|
printk("and Enabled\n");
|
|
else
|
|
printk("and Disabled\n");
|
|
|
|
#if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
|
|
/* we need to initialize the Flashrom device here since we might
|
|
* do things with flash early on in the boot
|
|
*/
|
|
flash_probe();
|
|
#endif
|
|
|
|
_bfin_swrst = bfin_read_SWRST();
|
|
|
|
if (_bfin_swrst & RESET_DOUBLE)
|
|
printk(KERN_INFO "Recovering from Double Fault event\n");
|
|
else if (_bfin_swrst & RESET_WDOG)
|
|
printk(KERN_INFO "Recovering from Watchdog event\n");
|
|
else if (_bfin_swrst & RESET_SOFTWARE)
|
|
printk(KERN_NOTICE "Reset caused by Software reset\n");
|
|
|
|
printk(KERN_INFO "Blackfin support (C) 2004-2008 Analog Devices, Inc.\n");
|
|
if (bfin_compiled_revid() == 0xffff)
|
|
printk(KERN_INFO "Compiled for ADSP-%s Rev any\n", CPU);
|
|
else if (bfin_compiled_revid() == -1)
|
|
printk(KERN_INFO "Compiled for ADSP-%s Rev none\n", CPU);
|
|
else
|
|
printk(KERN_INFO "Compiled for ADSP-%s Rev 0.%d\n", CPU, bfin_compiled_revid());
|
|
if (bfin_revid() != bfin_compiled_revid()) {
|
|
if (bfin_compiled_revid() == -1)
|
|
printk(KERN_ERR "Warning: Compiled for Rev none, but running on Rev %d\n",
|
|
bfin_revid());
|
|
else if (bfin_compiled_revid() != 0xffff)
|
|
printk(KERN_ERR "Warning: Compiled for Rev %d, but running on Rev %d\n",
|
|
bfin_compiled_revid(), bfin_revid());
|
|
}
|
|
if (bfin_revid() < SUPPORTED_REVID)
|
|
printk(KERN_ERR "Warning: Unsupported Chip Revision ADSP-%s Rev 0.%d detected\n",
|
|
CPU, bfin_revid());
|
|
printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
|
|
|
|
printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
|
|
cclk / 1000000, sclk / 1000000);
|
|
|
|
if (ANOMALY_05000273 && (cclk >> 1) <= sclk)
|
|
printk("\n\n\nANOMALY_05000273: CCLK must be >= 2*SCLK !!!\n\n\n");
|
|
|
|
setup_bootmem_allocator();
|
|
|
|
paging_init();
|
|
|
|
/* Copy atomic sequences to their fixed location, and sanity check that
|
|
these locations are the ones that we advertise to userspace. */
|
|
memcpy((void *)FIXED_CODE_START, &fixed_code_start,
|
|
FIXED_CODE_END - FIXED_CODE_START);
|
|
BUG_ON((char *)&sigreturn_stub - (char *)&fixed_code_start
|
|
!= SIGRETURN_STUB - FIXED_CODE_START);
|
|
BUG_ON((char *)&atomic_xchg32 - (char *)&fixed_code_start
|
|
!= ATOMIC_XCHG32 - FIXED_CODE_START);
|
|
BUG_ON((char *)&atomic_cas32 - (char *)&fixed_code_start
|
|
!= ATOMIC_CAS32 - FIXED_CODE_START);
|
|
BUG_ON((char *)&atomic_add32 - (char *)&fixed_code_start
|
|
!= ATOMIC_ADD32 - FIXED_CODE_START);
|
|
BUG_ON((char *)&atomic_sub32 - (char *)&fixed_code_start
|
|
!= ATOMIC_SUB32 - FIXED_CODE_START);
|
|
BUG_ON((char *)&atomic_ior32 - (char *)&fixed_code_start
|
|
!= ATOMIC_IOR32 - FIXED_CODE_START);
|
|
BUG_ON((char *)&atomic_and32 - (char *)&fixed_code_start
|
|
!= ATOMIC_AND32 - FIXED_CODE_START);
|
|
BUG_ON((char *)&atomic_xor32 - (char *)&fixed_code_start
|
|
!= ATOMIC_XOR32 - FIXED_CODE_START);
|
|
BUG_ON((char *)&safe_user_instruction - (char *)&fixed_code_start
|
|
!= SAFE_USER_INSTRUCTION - FIXED_CODE_START);
|
|
|
|
init_exception_vectors();
|
|
bf53x_cache_init();
|
|
}
|
|
|
|
static int __init topology_init(void)
|
|
{
|
|
int cpu;
|
|
|
|
for_each_possible_cpu(cpu) {
|
|
struct cpu *c = &per_cpu(cpu_devices, cpu);
|
|
|
|
register_cpu(c, cpu);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
subsys_initcall(topology_init);
|
|
|
|
static u_long get_vco(void)
|
|
{
|
|
u_long msel;
|
|
u_long vco;
|
|
|
|
msel = (bfin_read_PLL_CTL() >> 9) & 0x3F;
|
|
if (0 == msel)
|
|
msel = 64;
|
|
|
|
vco = CONFIG_CLKIN_HZ;
|
|
vco >>= (1 & bfin_read_PLL_CTL()); /* DF bit */
|
|
vco = msel * vco;
|
|
return vco;
|
|
}
|
|
|
|
/* Get the Core clock */
|
|
u_long get_cclk(void)
|
|
{
|
|
u_long csel, ssel;
|
|
if (bfin_read_PLL_STAT() & 0x1)
|
|
return CONFIG_CLKIN_HZ;
|
|
|
|
ssel = bfin_read_PLL_DIV();
|
|
csel = ((ssel >> 4) & 0x03);
|
|
ssel &= 0xf;
|
|
if (ssel && ssel < (1 << csel)) /* SCLK > CCLK */
|
|
return get_vco() / ssel;
|
|
return get_vco() >> csel;
|
|
}
|
|
EXPORT_SYMBOL(get_cclk);
|
|
|
|
/* Get the System clock */
|
|
u_long get_sclk(void)
|
|
{
|
|
u_long ssel;
|
|
|
|
if (bfin_read_PLL_STAT() & 0x1)
|
|
return CONFIG_CLKIN_HZ;
|
|
|
|
ssel = (bfin_read_PLL_DIV() & 0xf);
|
|
if (0 == ssel) {
|
|
printk(KERN_WARNING "Invalid System Clock\n");
|
|
ssel = 1;
|
|
}
|
|
|
|
return get_vco() / ssel;
|
|
}
|
|
EXPORT_SYMBOL(get_sclk);
|
|
|
|
unsigned long sclk_to_usecs(unsigned long sclk)
|
|
{
|
|
u64 tmp = USEC_PER_SEC * (u64)sclk;
|
|
do_div(tmp, get_sclk());
|
|
return tmp;
|
|
}
|
|
EXPORT_SYMBOL(sclk_to_usecs);
|
|
|
|
unsigned long usecs_to_sclk(unsigned long usecs)
|
|
{
|
|
u64 tmp = get_sclk() * (u64)usecs;
|
|
do_div(tmp, USEC_PER_SEC);
|
|
return tmp;
|
|
}
|
|
EXPORT_SYMBOL(usecs_to_sclk);
|
|
|
|
/*
|
|
* Get CPU information for use by the procfs.
|
|
*/
|
|
static int show_cpuinfo(struct seq_file *m, void *v)
|
|
{
|
|
char *cpu, *mmu, *fpu, *vendor, *cache;
|
|
uint32_t revid;
|
|
|
|
u_long cclk = 0, sclk = 0;
|
|
u_int dcache_size = 0, dsup_banks = 0;
|
|
|
|
cpu = CPU;
|
|
mmu = "none";
|
|
fpu = "none";
|
|
revid = bfin_revid();
|
|
|
|
cclk = get_cclk();
|
|
sclk = get_sclk();
|
|
|
|
switch (bfin_read_CHIPID() & CHIPID_MANUFACTURE) {
|
|
case 0xca:
|
|
vendor = "Analog Devices";
|
|
break;
|
|
default:
|
|
vendor = "unknown";
|
|
break;
|
|
}
|
|
|
|
seq_printf(m, "processor\t: %d\n"
|
|
"vendor_id\t: %s\n"
|
|
"cpu family\t: 0x%x\n"
|
|
"model name\t: ADSP-%s %lu(MHz CCLK) %lu(MHz SCLK) (%s)\n"
|
|
"stepping\t: %d\n",
|
|
0,
|
|
vendor,
|
|
(bfin_read_CHIPID() & CHIPID_FAMILY),
|
|
cpu, cclk/1000000, sclk/1000000,
|
|
#ifdef CONFIG_MPU
|
|
"mpu on",
|
|
#else
|
|
"mpu off",
|
|
#endif
|
|
revid);
|
|
|
|
seq_printf(m, "cpu MHz\t\t: %lu.%03lu/%lu.%03lu\n",
|
|
cclk/1000000, cclk%1000000,
|
|
sclk/1000000, sclk%1000000);
|
|
seq_printf(m, "bogomips\t: %lu.%02lu\n"
|
|
"Calibration\t: %lu loops\n",
|
|
(loops_per_jiffy * HZ) / 500000,
|
|
((loops_per_jiffy * HZ) / 5000) % 100,
|
|
(loops_per_jiffy * HZ));
|
|
|
|
/* Check Cache configutation */
|
|
switch (bfin_read_DMEM_CONTROL() & (1 << DMC0_P | 1 << DMC1_P)) {
|
|
case ACACHE_BSRAM:
|
|
cache = "dbank-A/B\t: cache/sram";
|
|
dcache_size = 16;
|
|
dsup_banks = 1;
|
|
break;
|
|
case ACACHE_BCACHE:
|
|
cache = "dbank-A/B\t: cache/cache";
|
|
dcache_size = 32;
|
|
dsup_banks = 2;
|
|
break;
|
|
case ASRAM_BSRAM:
|
|
cache = "dbank-A/B\t: sram/sram";
|
|
dcache_size = 0;
|
|
dsup_banks = 0;
|
|
break;
|
|
default:
|
|
cache = "unknown";
|
|
dcache_size = 0;
|
|
dsup_banks = 0;
|
|
break;
|
|
}
|
|
|
|
/* Is it turned on? */
|
|
if (!((bfin_read_DMEM_CONTROL()) & (ENDCPLB | DMC_ENABLE)))
|
|
dcache_size = 0;
|
|
|
|
seq_printf(m, "cache size\t: %d KB(L1 icache) "
|
|
"%d KB(L1 dcache-%s) %d KB(L2 cache)\n",
|
|
BFIN_ICACHESIZE / 1024, dcache_size,
|
|
#if defined CONFIG_BFIN_WB
|
|
"wb"
|
|
#elif defined CONFIG_BFIN_WT
|
|
"wt"
|
|
#endif
|
|
"", 0);
|
|
|
|
seq_printf(m, "%s\n", cache);
|
|
|
|
seq_printf(m, "icache setup\t: %d Sub-banks/%d Ways, %d Lines/Way\n",
|
|
BFIN_ISUBBANKS, BFIN_IWAYS, BFIN_ILINES);
|
|
seq_printf(m,
|
|
"dcache setup\t: %d Super-banks/%d Sub-banks/%d Ways, %d Lines/Way\n",
|
|
dsup_banks, BFIN_DSUBBANKS, BFIN_DWAYS,
|
|
BFIN_DLINES);
|
|
#ifdef CONFIG_BFIN_ICACHE_LOCK
|
|
switch (read_iloc()) {
|
|
case WAY0_L:
|
|
seq_printf(m, "Way0 Locked-Down\n");
|
|
break;
|
|
case WAY1_L:
|
|
seq_printf(m, "Way1 Locked-Down\n");
|
|
break;
|
|
case WAY01_L:
|
|
seq_printf(m, "Way0,Way1 Locked-Down\n");
|
|
break;
|
|
case WAY2_L:
|
|
seq_printf(m, "Way2 Locked-Down\n");
|
|
break;
|
|
case WAY02_L:
|
|
seq_printf(m, "Way0,Way2 Locked-Down\n");
|
|
break;
|
|
case WAY12_L:
|
|
seq_printf(m, "Way1,Way2 Locked-Down\n");
|
|
break;
|
|
case WAY012_L:
|
|
seq_printf(m, "Way0,Way1 & Way2 Locked-Down\n");
|
|
break;
|
|
case WAY3_L:
|
|
seq_printf(m, "Way3 Locked-Down\n");
|
|
break;
|
|
case WAY03_L:
|
|
seq_printf(m, "Way0,Way3 Locked-Down\n");
|
|
break;
|
|
case WAY13_L:
|
|
seq_printf(m, "Way1,Way3 Locked-Down\n");
|
|
break;
|
|
case WAY013_L:
|
|
seq_printf(m, "Way 0,Way1,Way3 Locked-Down\n");
|
|
break;
|
|
case WAY32_L:
|
|
seq_printf(m, "Way3,Way2 Locked-Down\n");
|
|
break;
|
|
case WAY320_L:
|
|
seq_printf(m, "Way3,Way2,Way0 Locked-Down\n");
|
|
break;
|
|
case WAY321_L:
|
|
seq_printf(m, "Way3,Way2,Way1 Locked-Down\n");
|
|
break;
|
|
case WAYALL_L:
|
|
seq_printf(m, "All Ways are locked\n");
|
|
break;
|
|
default:
|
|
seq_printf(m, "No Ways are locked\n");
|
|
}
|
|
#endif
|
|
seq_printf(m, "board name\t: %s\n", bfin_board_name);
|
|
seq_printf(m, "board memory\t: %ld kB (0x%p -> 0x%p)\n",
|
|
physical_mem_end >> 10, (void *)0, (void *)physical_mem_end);
|
|
seq_printf(m, "kernel memory\t: %d kB (0x%p -> 0x%p)\n",
|
|
((int)memory_end - (int)_stext) >> 10,
|
|
_stext,
|
|
(void *)memory_end);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
return *pos < NR_CPUS ? ((void *)0x12345678) : NULL;
|
|
}
|
|
|
|
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
|
|
{
|
|
++*pos;
|
|
return c_start(m, pos);
|
|
}
|
|
|
|
static void c_stop(struct seq_file *m, void *v)
|
|
{
|
|
}
|
|
|
|
const struct seq_operations cpuinfo_op = {
|
|
.start = c_start,
|
|
.next = c_next,
|
|
.stop = c_stop,
|
|
.show = show_cpuinfo,
|
|
};
|
|
|
|
void __init cmdline_init(const char *r0)
|
|
{
|
|
if (r0)
|
|
strncpy(command_line, r0, COMMAND_LINE_SIZE);
|
|
}
|