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-rw-r--r--include/asm-arm/arch-ixp2000/entry-macro.S53
1 files changed, 53 insertions, 0 deletions
diff --git a/include/asm-arm/arch-ixp2000/entry-macro.S b/include/asm-arm/arch-ixp2000/entry-macro.S
new file mode 100644
index 00000000000..e3a4e412129
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+++ b/include/asm-arm/arch-ixp2000/entry-macro.S
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+/*
+ * include/asm-arm/arch-ixp2000/entry-macro.S
+ *
+ * Low-level IRQ helper macros for IXP2000-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
+
+ mov \irqnr, #0x0 @clear out irqnr as default
+ mov \base, #0xfe000000
+ orr \base, \base, #0x00e00000
+ orr \base, \base, #0x08
+ ldr \irqstat, [\base] @ get interrupts
+
+ cmp \irqstat, #0
+ beq 1001f
+
+ clz \irqnr, \irqstat
+ mov \base, #31
+ subs \irqnr, \base, \irqnr
+
+ /*
+ * We handle PCIA and PCIB here so we don't have an
+ * extra layer of code just to check these two bits.
+ */
+ cmp \irqnr, #IRQ_IXP2000_PCI
+ bne 1001f
+
+ mov \base, #0xfe000000
+ orr \base, \base, #0x00c00000
+ orr \base, \base, #0x00000100
+ orr \base, \base, #0x00000058
+ ldr \irqstat, [\base]
+
+ mov \tmp, #(1<<26)
+ tst \irqstat, \tmp
+ movne \irqnr, #IRQ_IXP2000_PCIA
+ bne 1001f
+
+ mov \tmp, #(1<<27)
+ tst \irqstat, \tmp
+ movne \irqnr, #IRQ_IXP2000_PCIB
+
+1001:
+ .endm
+