69 lines
2.1 KiB
ArmAsm
69 lines
2.1 KiB
ArmAsm
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/*
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* Idle processing for ARMv7-based Qualcomm SoCs.
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*
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* Copyright (C) 2007 Google, Inc.
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* Copyright (c) 2007-2009, 2011-2014 The Linux Foundation. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/linkage.h>
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#include <linux/threads.h>
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#include <asm/assembler.h>
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.arm
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ENTRY(msm_pm_boot_entry)
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THUMB( adr r9, BSYM(2f) ) /* Kernel is always entered in ARM. */
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THUMB( bx r9 ) /* If this is a Thumb-2 kernel, */
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THUMB( .thumb ) /* switch to Thumb now. */
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THUMB(2: )
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mrc p15, 0, r0, c0, c0, 5 /* MPIDR */
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bic r0, #0xff000000 /* what CPU am I */
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bic r0, #0x00ff0000 /* clear bits 31-16 */
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adr r3, 3f
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ldr r1, [r3]
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sub r3, r1, r3 /* r3 holds the virt to phy offset */
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ldr r1, =msm_pc_debug_counters_phys /* phys addr for IMEM reg */
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sub r1, r1, r3 /* translate virt to phys */
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ldr r1,[r1]
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cmp r1, #0
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beq skip_pc_debug3
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mov r2, r0, lsr #8 /* get cluster num */
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add r1, r1, r2, lsl #6 /* get offset of cluster */
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and r2, r0, #0xff
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add r1, r1, r2, lsl #4 /* get offset for the cpu */
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add r1, #4 /* warmboot entry counter */
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ldr r2, [r1]
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add r2, #1
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str r2, [r1]
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skip_pc_debug3:
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ldr r1, =msm_pm_boot_vector
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sub r1, r1, r3 /* translate virt to phys */
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mov r2, r0, lsr #8 /* get cluster num */
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add r1, r1, r2, lsl #4 /* Get offset for the cluster */
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and r0, r0, #0xff /* cpu id */
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add r1, r1, r0, lsl #2 /* Get offset for the cpu */
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ldr pc, [r1] /* jump */
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ENDPROC(msm_pm_boot_entry)
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3: .long .
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.data
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.globl msm_pm_boot_vector
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msm_pm_boot_vector:
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.space 4 * 4 * 4
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.globl msm_pc_debug_counters_phys
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msm_pc_debug_counters_phys:
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.long 0x0
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