1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
35 lines
939 B
ArmAsm
35 lines
939 B
ArmAsm
/*
|
|
* include/asm-arm/arch-shark/entry-macro.S
|
|
*
|
|
* Low-level IRQ helper macros for Shark platform
|
|
*
|
|
* 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 r4, #0xe0000000
|
|
|
|
mov \irqstat, #0x0C
|
|
strb \irqstat, [r4, #0x20] @outb(0x0C, 0x20) /* Poll command */
|
|
ldrb \irqnr, [r4, #0x20] @irq = inb(0x20) & 7
|
|
and \irqstat, \irqnr, #0x80
|
|
teq \irqstat, #0
|
|
beq 43f
|
|
and \irqnr, \irqnr, #7
|
|
teq \irqnr, #2
|
|
bne 44f
|
|
43: mov \irqstat, #0x0C
|
|
strb \irqstat, [r4, #0xa0] @outb(0x0C, 0xA0) /* Poll command */
|
|
ldrb \irqnr, [r4, #0xa0] @irq = (inb(0xA0) & 7) + 8
|
|
and \irqstat, \irqnr, #0x80
|
|
teq \irqstat, #0
|
|
beq 44f
|
|
and \irqnr, \irqnr, #7
|
|
add \irqnr, \irqnr, #8
|
|
44: teq \irqstat, #0
|
|
.endm
|
|
|