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-ixp4xx/entry-macro.S
- *
- * Low-level IRQ helper macros for IXP4xx-based 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 irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP_OFFSET)
- ldr irqstat, [irqstat] @ get interrupts
- cmp irqstat, #0
- beq 1001f @ upper IRQ?
- clz irqnr, irqstat
- mov base, #31
- sub irqnr, base, irqnr
- b 1002f @ lower IRQ being
- @ handled
- 1001:
- /*
- * IXP465 has an upper IRQ status register
- */
- #if defined(CONFIG_CPU_IXP46X)
- ldr irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP2_OFFSET)
- ldr irqstat, [irqstat] @ get upper interrupts
- mov irqnr, #63
- clz irqstat, irqstat
- cmp irqstat, #32
- subne irqnr, irqnr, irqstat
- #endif
- 1002:
- .endm