From a09e64fbc0094e3073dbb09c3b4bfe4ab669244b Mon Sep 17 00:00:00 2001 From: Russell King Date: Tue, 5 Aug 2008 16:14:15 +0100 Subject: [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King --- arch/arm/mach-s3c2410/include/mach/entry-macro.S | 78 ++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 arch/arm/mach-s3c2410/include/mach/entry-macro.S (limited to 'arch/arm/mach-s3c2410/include/mach/entry-macro.S') diff --git a/arch/arm/mach-s3c2410/include/mach/entry-macro.S b/arch/arm/mach-s3c2410/include/mach/entry-macro.S new file mode 100644 index 00000000000..473b3cd37d9 --- /dev/null +++ b/arch/arm/mach-s3c2410/include/mach/entry-macro.S @@ -0,0 +1,78 @@ +/* + * arch/arm/mach-s3c2410/include/mach/entry-macro.S + * + * Low-level IRQ helper macros for S3C2410-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. +*/ + +/* We have a problem that the INTOFFSET register does not always + * show one interrupt. Occasionally we get two interrupts through + * the prioritiser, and this causes the INTOFFSET register to show + * what looks like the logical-or of the two interrupt numbers. + * + * Thanks to Klaus, Shannon, et al for helping to debug this problem +*/ + +#define INTPND (0x10) +#define INTOFFSET (0x14) + +#include +#include + + .macro get_irqnr_preamble, base, tmp + .endm + + .macro arch_ret_to_user, tmp1, tmp2 + .endm + + .macro get_irqnr_and_base, irqnr, irqstat, base, tmp + + mov \base, #S3C24XX_VA_IRQ + + @@ try the interrupt offset register, since it is there + + ldr \irqstat, [ \base, #INTPND ] + teq \irqstat, #0 + beq 1002f + ldr \irqnr, [ \base, #INTOFFSET ] + mov \tmp, #1 + tst \irqstat, \tmp, lsl \irqnr + bne 1001f + + @@ the number specified is not a valid irq, so try + @@ and work it out for ourselves + + mov \irqnr, #0 @@ start here + + @@ work out which irq (if any) we got + + movs \tmp, \irqstat, lsl#16 + addeq \irqnr, \irqnr, #16 + moveq \irqstat, \irqstat, lsr#16 + tst \irqstat, #0xff + addeq \irqnr, \irqnr, #8 + moveq \irqstat, \irqstat, lsr#8 + tst \irqstat, #0xf + addeq \irqnr, \irqnr, #4 + moveq \irqstat, \irqstat, lsr#4 + tst \irqstat, #0x3 + addeq \irqnr, \irqnr, #2 + moveq \irqstat, \irqstat, lsr#2 + tst \irqstat, #0x1 + addeq \irqnr, \irqnr, #1 + + @@ we have the value +1001: + adds \irqnr, \irqnr, #IRQ_EINT0 +1002: + @@ exit here, Z flag unset if IRQ + + .endm + + /* currently don't need an disable_fiq macro */ + + .macro disable_fiq + .endm -- cgit v1.2.3