| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * include/asm-arm/arch-lh7a40x/entry-macro.S |
| 3 | * |
| 4 | * Low-level IRQ helper macros for LH7A40x platforms |
| 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 | |
| 11 | # if defined (CONFIG_ARCH_LH7A400) && defined (CONFIG_ARCH_LH7A404) |
| 12 | # error "LH7A400 and LH7A404 are mutually exclusive" |
| 13 | # endif |
| 14 | |
| 15 | # if defined (CONFIG_ARCH_LH7A400) |
| 16 | .macro disable_fiq |
| 17 | .endm |
| 18 | |
| 19 | .macro get_irqnr_and_base, irqnr, irqstat, base, tmp |
| 20 | mov \irqnr, #0 |
| 21 | mov \base, #io_p2v(0x80000000) @ APB registers |
| 22 | ldr \irqstat, [\base, #0x500] @ PIC INTSR |
| 23 | |
| 24 | 1001: movs \irqstat, \irqstat, lsr #1 @ Shift into carry |
| 25 | bcs 1008f @ Bit set; irq found |
| 26 | add \irqnr, \irqnr, #1 |
| 27 | bne 1001b @ Until no bits |
| 28 | b 1009f @ Nothing? Hmm. |
| 29 | 1008: movs \irqstat, #1 @ Force !Z |
| 30 | 1009: |
| 31 | .endm |
| 32 | |
| 33 | #elif defined(CONFIG_ARCH_LH7A404) |
| 34 | |
| 35 | .macro disable_fiq |
| 36 | .endm |
| 37 | |
| 38 | .macro get_irqnr_and_base, irqnr, irqstat, base, tmp |
| 39 | mov \irqnr, #0 @ VIC1 irq base |
| 40 | mov \base, #io_p2v(0x80000000) @ APB registers |
| 41 | add \base, \base, #0x8000 |
| 42 | ldr \tmp, [\base, #0x0030] @ VIC1_VECTADDR |
| 43 | tst \tmp, #VA_VECTORED @ Direct vectored |
| 44 | bne 1002f |
| 45 | tst \tmp, #VA_VIC1DEFAULT @ Default vectored VIC1 |
| 46 | ldrne \irqstat, [\base, #0] @ VIC1_IRQSTATUS |
| 47 | bne 1001f |
| 48 | add \base, \base, #(0xa000 - 0x8000) |
| 49 | ldr \tmp, [\base, #0x0030] @ VIC2_VECTADDR |
| 50 | tst \tmp, #VA_VECTORED @ Direct vectored |
| 51 | bne 1002f |
| 52 | ldr \irqstat, [\base, #0] @ VIC2_IRQSTATUS |
| 53 | mov \irqnr, #32 @ VIC2 irq base |
| 54 | |
| 55 | 1001: movs \irqstat, \irqstat, lsr #1 @ Shift into carry |
| 56 | bcs 1008f @ Bit set; irq found |
| 57 | add \irqnr, \irqnr, #1 |
| 58 | bne 1001b @ Until no bits |
| 59 | b 1009f @ Nothing? Hmm. |
| 60 | 1002: and \irqnr, \tmp, #0x3f @ Mask for valid bits |
| 61 | 1008: movs \irqstat, #1 @ Force !Z |
| 62 | str \tmp, [\base, #0x0030] @ Clear vector |
| 63 | 1009: |
| 64 | .endm |
| 65 | #endif |
| 66 | |
| 67 | |