diff options
| author | florian <florian@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-06-20 21:57:45 +0000 |
|---|---|---|
| committer | florian <florian@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-06-20 21:57:45 +0000 |
| commit | 3a5b7c7629c57edb6063c839ccad36ab48353726 (patch) | |
| tree | 71bf1ec21686eee19a6eba35908e106b3be9b5e2 /target | |
| parent | 85bb2ebefa043ec2ba9d1c7bcdfcea2e02707864 (diff) | |
[mcs814x] do not use MULTI_IRQ_HANDLER it is bogus on our platform
This caused stalls in the Ethernet DMA block, so until properly
written and sorted out, fallback to the assembly version instead.
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@32470 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target')
3 files changed, 25 insertions, 23 deletions
diff --git a/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/include/mach/entry-macro.S b/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/include/mach/entry-macro.S index 9974dad293..eeff72ca64 100644 --- a/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/include/mach/entry-macro.S +++ b/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/include/mach/entry-macro.S @@ -4,3 +4,26 @@ .macro arch_ret_to_user, tmp1, tmp2 .endm + + .macro get_irqnr_preamble, base, tmp + ldr \base, =mcs814x_intc_base @ base virtual address of AIC peripheral + ldr \base, [\base] + .endm + + .macro get_irqnr_and_base, irqnr, irqstat, base, tmp + mov \tmp, #0x40 + ldr \irqstat, [\base, \tmp] + tst \irqstat, \irqstat @ test if no active IRQ's + beq 1002f @ if no active irqs return with status 0 + mov \irqnr, #0 @ start from irq zero + mov \tmp, #1 @ the mask initially 1 +1001: + tst \irqstat, \tmp @ and with mask + addeq \irqnr, \irqnr, #1 @ if zero then add one to nr + moveq \tmp, \tmp, lsl #1 @ shift mask one to left + beq 1001b @ if zero then loop again + mov \irqstat, \tmp @ save the return mask + mov \tmp, #0x00 @ ICR offset + str \irqstat, [\base, \tmp] @ clear irq with selected mask +1002: + .endm diff --git a/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/irq.c b/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/irq.c index cf86734afb..c8a3c18cfb 100644 --- a/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/irq.c +++ b/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/irq.c @@ -20,7 +20,7 @@ #define MCS814X_IRQ_MASK 0x20 #define MCS814X_IRQ_STS0 0x40 -static void __iomem *mcs814x_intc_base; +void __iomem *mcs814x_intc_base; static void __init mcs814x_alloc_gc(void __iomem *base, unsigned int irq_start, unsigned int num) @@ -47,26 +47,6 @@ static void __init mcs814x_alloc_gc(void __iomem *base, unsigned int irq_start, __raw_writel(0xffffffff, base + MCS814X_IRQ_ICR); } -asmlinkage void __exception_irq_entry mcs814x_handle_irq(struct pt_regs *regs) -{ - u32 status, irq; - - do { - /* read the status register */ - status = __raw_readl(mcs814x_intc_base + MCS814X_IRQ_STS0); - if (!status) - break; - - irq = ffs(status) - 1; - status |= (1 << irq); - /* clear the interrupt */ - __raw_writel(status, mcs814x_intc_base + MCS814X_IRQ_ICR); - /* call the generic handler */ - handle_IRQ(irq, regs); - - } while (1); -} - static const struct of_device_id mcs814x_intc_ids[] = { { .compatible = "moschip,mcs814x-intc" }, { /* sentinel */ }, diff --git a/target/linux/mcs814x/patches-3.3/001-platform.patch b/target/linux/mcs814x/patches-3.3/001-platform.patch index dc153a5d4e..fbe79af594 100644 --- a/target/linux/mcs814x/patches-3.3/001-platform.patch +++ b/target/linux/mcs814x/patches-3.3/001-platform.patch @@ -1,6 +1,6 @@ --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig -@@ -869,6 +869,21 @@ config ARCH_EXYNOS +@@ -869,6 +869,20 @@ config ARCH_EXYNOS help Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5) @@ -15,7 +15,6 @@ + select CLKDEV_LOOKUP + select ARCH_USES_GETTIMEOFFSET + select NEED_MACH_MEMORY_H -+ select MULTI_IRQ_HANDLER + help + Support for Moschip MCS814x SoCs (MCS8140). + |