| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * include/asm-arm/arch-shark/entry-macro.S |
| 3 | * |
| 4 | * Low-level IRQ helper macros for Shark platform |
| 5 | * |
| 6 | * This file is licensed under the terms of the GNU General Public |
| 7 | * License version 2. This program is licensed "as is" without any |
| 8 | * warranty of any kind, whether express or implied. |
| 9 | */ |
| 10 | .macro disable_fiq |
| 11 | .endm |
| 12 | |
| Dan Williams | f80dff9 | 2007-02-16 22:16:32 +0100 | [diff] [blame] | 13 | .macro get_irqnr_preamble, base, tmp |
| 14 | .endm |
| 15 | |
| 16 | .macro arch_ret_to_user, tmp1, tmp2 |
| 17 | .endm |
| 18 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | .macro get_irqnr_and_base, irqnr, irqstat, base, tmp |
| 20 | mov r4, #0xe0000000 |
| 21 | |
| 22 | mov \irqstat, #0x0C |
| 23 | strb \irqstat, [r4, #0x20] @outb(0x0C, 0x20) /* Poll command */ |
| 24 | ldrb \irqnr, [r4, #0x20] @irq = inb(0x20) & 7 |
| 25 | and \irqstat, \irqnr, #0x80 |
| 26 | teq \irqstat, #0 |
| 27 | beq 43f |
| 28 | and \irqnr, \irqnr, #7 |
| 29 | teq \irqnr, #2 |
| 30 | bne 44f |
| 31 | 43: mov \irqstat, #0x0C |
| 32 | strb \irqstat, [r4, #0xa0] @outb(0x0C, 0xA0) /* Poll command */ |
| 33 | ldrb \irqnr, [r4, #0xa0] @irq = (inb(0xA0) & 7) + 8 |
| 34 | and \irqstat, \irqnr, #0x80 |
| 35 | teq \irqstat, #0 |
| 36 | beq 44f |
| 37 | and \irqnr, \irqnr, #7 |
| 38 | add \irqnr, \irqnr, #8 |
| 39 | 44: teq \irqstat, #0 |
| 40 | .endm |
| 41 | |