diff options
Diffstat (limited to 'include/asm-arm/arch-versatile/entry-macro.S')
| -rw-r--r-- | include/asm-arm/arch-versatile/entry-macro.S | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/asm-arm/arch-versatile/entry-macro.S b/include/asm-arm/arch-versatile/entry-macro.S new file mode 100644 index 000000000000..90e4e970d253 --- /dev/null +++ b/include/asm-arm/arch-versatile/entry-macro.S @@ -0,0 +1,35 @@ +/* + * include/asm-arm/arch-versatile/entry-macro.S + * + * Low-level IRQ helper macros for Versatile 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 + ldr \base, =IO_ADDRESS(VERSATILE_VIC_BASE) + ldr \irqstat, [\base, #VIC_IRQ_STATUS] @ get masked status + mov \irqnr, #0 + teq \irqstat, #0 + beq 1003f + +1001: tst \irqstat, #15 + bne 1002f + add \irqnr, \irqnr, #4 + movs \irqstat, \irqstat, lsr #4 + bne 1001b +1002: tst \irqstat, #1 + bne 1003f + add \irqnr, \irqnr, #1 + movs \irqstat, \irqstat, lsr #1 + bne 1002b +1003: /* EQ will be set if no irqs pending */ + +@ clz \irqnr, \irqstat +@1003: /* EQ will be set if we reach MAXIRQNUM */ + .endm + |