entry-macro.S
上传用户:szlgq88
上传日期:2009-04-28
资源大小:48287k
文件大小:1k
- /*
- * include/asm-arm/arch-integrator/entry-macro.S
- *
- * Low-level IRQ helper macros for Integrator 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
- /* FIXME: should not be using soo many LDRs here */
- ldr base, =IO_ADDRESS(INTEGRATOR_IC_BASE)
- mov irqnr, #IRQ_PIC_START
- ldr irqstat, [base, #IRQ_STATUS] @ get masked status
- ldr base, =IO_ADDRESS(INTEGRATOR_HDR_BASE)
- teq irqstat, #0
- ldreq irqstat, [base, #(INTEGRATOR_HDR_IC_OFFSET+IRQ_STATUS)]
- moveq irqnr, #IRQ_CIC_START
- 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 */
- .endm