Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 119 insertions, 0 deletions

diff --git a/include/asm-arm/arch-s3c2410/entry-macro.S b/include/asm-arm/arch-s3c2410/entry-macro.S
new file mode 100644
index 00000000000..b7d4d7f4422
--- /dev/null
+++ b/include/asm-arm/arch-s3c2410/entry-macro.S
@@ -0,0 +1,119 @@
+/*
+ * include/asm-arm/arch-s3c2410/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.
+
+ * Modifications:
+ *     10-Mar-2005 LCVR  Changed S3C2410_VA to S3C24XX_VA
+ */
+
+
+	.macro	get_irqnr_and_base, irqnr, irqstat, base, tmp
+
+		mov	\tmp, #S3C24XX_VA_IRQ
+		ldr	\irqnr, [ \tmp, #0x14 ]		@ get irq no
+30000:
+		teq	\irqnr, #4
+		teqne	\irqnr, #5
+		beq	1002f				@ external irq reg
+
+		@ debug check to see if interrupt reported is the same
+		@ as the offset....
+
+		teq	\irqnr, #0
+		beq	20002f
+		ldr	\irqstat, [ \tmp, #0x10 ]	@ INTPND
+		mov	\irqstat, \irqstat, lsr \irqnr
+		tst	\irqstat, #1
+		bne	20002f
+
+		/* debug/warning if we get an invalud response from the
+		 * INTOFFSET register */
+#if 1
+		stmfd	r13!, { r0 - r4 , r8-r12, r14 }
+		ldr	r1,	[ \tmp, #0x14 ]		@ INTOFFSET
+		ldr	r2,	[ \tmp, #0x10 ]		@ INTPND
+		ldr	r3,	[ \tmp, #0x00 ]		@ SRCPND
+		adr	r0, 20003f
+		bl	printk
+		b	20004f
+
+20003:
+		.ascii	"<7>irq: err - bad offset %d, intpnd=%08x, srcpnd=%08x\n"
+		.byte	0
+		.align	4
+20004:
+		mov	r1, #1
+		mov	\tmp, #S3C24XX_VA_IRQ
+		ldmfd	r13!, { r0 - r4 , r8-r12, r14 }
+#endif
+
+		@ try working out interrupt number for ourselves
+		mov	\irqnr, #0
+		ldr	\irqstat, [ \tmp, #0x10 ]	@ INTPND
+10021:
+		movs	\irqstat, \irqstat, lsr#1
+		bcs	30000b		@ try and re-start the proccess
+		add	\irqnr, \irqnr, #1
+		cmp	\irqnr, #32
+		ble	10021b
+
+		@ found no interrupt, set Z flag and leave
+		movs	\irqnr, #0
+		b	1001f
+
+20005:
+20002:		@ exit
+		@ we base the s3c2410x interrupts at 16 and above to allow
+		@ isa peripherals to have their standard interrupts, also
+		@ ensure that Z flag is un-set on exit
+
+		@ note, we cannot be sure if we get IRQ_EINT0 (0) that
+		@ there is simply no interrupt pending, so in all other
+		@ cases we jump to say we have found something, otherwise
+		@ we check to see if the interrupt really is assrted
+		adds	\irqnr, \irqnr, #IRQ_EINT0
+		teq	\irqnr, #IRQ_EINT0
+		bne	1001f				@ exit
+		ldr	\irqstat, [ \tmp, #0x10 ]	@ INTPND
+		teq	\irqstat, #0
+		moveq	\irqnr, #0
+		b	1001f
+
+		@ we get here from no main or external interrupts pending
+1002:
+		add	\tmp, \tmp, #S3C24XX_VA_GPIO - S3C24XX_VA_IRQ
+		ldr	\irqstat, [ \tmp, # 0xa8 ]	@ EXTINTPEND
+		ldr	\irqnr, [ \tmp, # 0xa4 ]	@ EXTINTMASK
+
+		bic	\irqstat, \irqstat, \irqnr	@ clear masked irqs
+
+		mov	\irqnr, #IRQ_EINT4		@ start extint nos
+		mov	\irqstat, \irqstat, lsr#4	@ ignore bottom 4 bits
+10021:
+		movs	\irqstat, \irqstat, lsr#1
+		bcs	1004f
+		add	\irqnr, \irqnr, #1
+		cmp	\irqnr, #IRQ_EINT23
+		ble	10021b
+
+		@ found no interrupt, set Z flag and leave
+		movs	\irqnr, #0
+
+1004:		@ ensure Z flag clear in case our MOVS shifted out the last bit
+		teq	\irqnr, #0
+1001:
+		@ exit irq routine
+		.endm
+
+
+		/* currently don't need an disable_fiq macro */
+
+		.macro	disable_fiq
+		.endm
+
+