init android origin source code

1 files changed, 57 insertions, 0 deletions

diff --git a/ANDROID_3.4.5/arch/arm/mach-h720x/include/mach/entry-macro.S b/ANDROID_3.4.5/arch/arm/mach-h720x/include/mach/entry-macro.S
new file mode 100644
index 00000000..75267fad
--- /dev/null
+++ b/ANDROID_3.4.5/arch/arm/mach-h720x/include/mach/entry-macro.S
@@ -0,0 +1,57 @@
+/*
+ * arch/arm/mach-h720x/include/mach/entry-macro.S
+ *
+ * Low-level IRQ helper macros for Hynix HMS720x 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  get_irqnr_preamble, base, tmp
+		.endm
+
+		.macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
+#if defined (CONFIG_CPU_H7201) || defined (CONFIG_CPU_H7202)
+		@ we could use the id register on H7202, but this is not
+		@ properly updated when we come back from asm_do_irq
+		@ without a previous return from interrupt
+		@ (see loops below in irq_svc, irq_usr)
+		@ We see unmasked pending ints only, as the masked pending ints
+		@ are not visible here
+
+		mov     \base, #0xf0000000	       @ base register
+		orr     \base, \base, #0x24000	       @ irqbase
+		ldr     \irqstat, [\base, #0x04]        @ get interrupt status
+#if defined (CONFIG_CPU_H7201)
+		ldr	\tmp, =0x001fffff
+#else
+		mvn     \tmp, #0xc0000000
+#endif
+		and     \irqstat, \irqstat, \tmp        @ mask out unused ints
+		mov     \irqnr, #0
+
+		mov     \tmp, #0xff00
+		orr     \tmp, \tmp, #0xff
+		tst     \irqstat, \tmp
+		addeq   \irqnr, \irqnr, #16
+		moveq   \irqstat, \irqstat, lsr #16
+		tst     \irqstat, #255
+		addeq   \irqnr, \irqnr, #8
+		moveq   \irqstat, \irqstat, lsr #8
+		tst     \irqstat, #15
+		addeq   \irqnr, \irqnr, #4
+		moveq   \irqstat, \irqstat, lsr #4
+		tst     \irqstat, #3
+		addeq   \irqnr, \irqnr, #2
+		moveq   \irqstat, \irqstat, lsr #2
+		tst     \irqstat, #1
+		addeq   \irqnr, \irqnr, #1
+		moveq   \irqstat, \irqstat, lsr #1
+		tst     \irqstat, #1		       @ bit 0 should be set
+		.endm
+
+#else
+#error hynix processor selection missmatch
+#endif
+