54 lines
1.2 KiB
ArmAsm
54 lines
1.2 KiB
ArmAsm
|
/*
|
||
|
|
* include/asm-arm/arch-ixp2000/entry-macro.S
|
||
|
|
*
|
||
|
|
* Low-level IRQ helper macros for IXP2000-based platforms
|
||
|
|
*
|
||
|
|
* This file is licensed under the terms of the GNU General Public
|
||
|
|
* License version 2. This program is licensed "as is" without any
|
||
|
|
* warranty of any kind, whether express or implied.
|
||
|
|
*/
|
||
|
|
|
||
|
|
.macro disable_fiq
|
||
|
|
.endm
|
||
|
|
|
||
|
|
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
|
||
|
|
|
||
|
|
mov \irqnr, #0x0 @clear out irqnr as default
|
||
|
|
mov \base, #0xfe000000
|
||
|
|
orr \base, \base, #0x00e00000
|
||
|
|
orr \base, \base, #0x08
|
||
|
|
ldr \irqstat, [\base] @ get interrupts
|
||
|
|
|
||
|
|
cmp \irqstat, #0
|
||
|
|
beq 1001f
|
||
|
|
|
||
|
|
clz \irqnr, \irqstat
|
||
|
|
mov \base, #31
|
||
|
|
subs \irqnr, \base, \irqnr
|
||
|
|
|
||
|
|
/*
|
||
|
|
* We handle PCIA and PCIB here so we don't have an
|
||
|
|
* extra layer of code just to check these two bits.
|
||
|
|
*/
|
||
|
|
cmp \irqnr, #IRQ_IXP2000_PCI
|
||
|
|
bne 1001f
|
||
|
|
|
||
|
|
mov \base, #0xfe000000
|
||
|
|
orr \base, \base, #0x00c00000
|
||
|
|
orr \base, \base, #0x00000100
|
||
|
|
orr \base, \base, #0x00000058
|
||
|
|
ldr \irqstat, [\base]
|
||
|
|
|
||
|
|
mov \tmp, #(1<<26)
|
||
|
|
tst \irqstat, \tmp
|
||
|
|
movne \irqnr, #IRQ_IXP2000_PCIA
|
||
|
|
bne 1001f
|
||
|
|
|
||
|
|
mov \tmp, #(1<<27)
|
||
|
|
tst \irqstat, \tmp
|
||
|
|
movne \irqnr, #IRQ_IXP2000_PCIB
|
||
|
|
|
||
|
|
1001:
|
||
|
|
.endm
|
||
|
|
|