diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-3.14/020-MIPS-BCM63XX-replace-irq-dispatch-code-with-a-generi.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-3.14/020-MIPS-BCM63XX-replace-irq-dispatch-code-with-a-generi.patch | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/target/linux/brcm63xx/patches-3.14/020-MIPS-BCM63XX-replace-irq-dispatch-code-with-a-generi.patch b/target/linux/brcm63xx/patches-3.14/020-MIPS-BCM63XX-replace-irq-dispatch-code-with-a-generi.patch deleted file mode 100644 index 021d0d9537..0000000000 --- a/target/linux/brcm63xx/patches-3.14/020-MIPS-BCM63XX-replace-irq-dispatch-code-with-a-generi.patch +++ /dev/null @@ -1,174 +0,0 @@ -From 39b46ed1c9fe71890566e129d9ac5feb8421b3b4 Mon Sep 17 00:00:00 2001 -From: Jonas Gorski <jogo@openwrt.org> -Date: Thu, 18 Apr 2013 21:14:49 +0200 -Subject: [PATCH 03/10] MIPS: BCM63XX: replace irq dispatch code with a generic - version - -The generic version uses a variable length of u32 registers instead of u32/u64. -This allows easier support for "wider" registers without having to rewrite -everything. - -This "generic" version is as fast as the old version in the best case -(i == next set bit), and twice as fast in the worst case in 64 bits. - -Using a macro was chosen over a (forced) inline version because gcc generated -more compact code with the macro. - -The change from (signed) int to unsigned int for i and to_call was intentional -as the value can be only between 0 and (width - 1) anyway, and allowed gcc to -optimise the code a bit further. - -Signed-off-by: Jonas Gorski <jogo@openwrt.org> ---- - arch/mips/bcm63xx/irq.c | 130 +++++++++++++++++++++--------------------------- - 1 file changed, 56 insertions(+), 74 deletions(-) - ---- a/arch/mips/bcm63xx/irq.c -+++ b/arch/mips/bcm63xx/irq.c -@@ -51,47 +51,65 @@ static inline void handle_internal(int i - * will resume the loop where it ended the last time we left this - * function. - */ --static void __dispatch_internal_32(void) --{ -- u32 pending; -- static int i; -- -- pending = bcm_readl(irq_stat_addr) & bcm_readl(irq_mask_addr); -- -- if (!pending) -- return ; -- -- while (1) { -- int to_call = i; - -- i = (i + 1) & 0x1f; -- if (pending & (1 << to_call)) { -- handle_internal(to_call); -- break; -- } -- } -+#define BUILD_IPIC_INTERNAL(width) \ -+void __dispatch_internal_##width(void) \ -+{ \ -+ u32 pending[width / 32]; \ -+ unsigned int src, tgt; \ -+ bool irqs_pending = false; \ -+ static unsigned int i; \ -+ \ -+ /* read registers in reverse order */ \ -+ for (src = 0, tgt = (width / 32); src < (width / 32); src++) { \ -+ u32 val; \ -+ \ -+ val = bcm_readl(irq_stat_addr + src * sizeof(u32)); \ -+ val &= bcm_readl(irq_mask_addr + src * sizeof(u32)); \ -+ pending[--tgt] = val; \ -+ \ -+ if (val) \ -+ irqs_pending = true; \ -+ } \ -+ \ -+ if (!irqs_pending) \ -+ return; \ -+ \ -+ while (1) { \ -+ unsigned int to_call = i; \ -+ \ -+ i = (i + 1) & (width - 1); \ -+ if (pending[to_call / 32] & (1 << (to_call & 0x1f))) { \ -+ handle_internal(to_call); \ -+ break; \ -+ } \ -+ } \ -+} \ -+ \ -+static void __internal_irq_mask_##width(unsigned int irq) \ -+{ \ -+ u32 val; \ -+ unsigned reg = (irq / 32) ^ (width/32 - 1); \ -+ unsigned bit = irq & 0x1f; \ -+ \ -+ val = bcm_readl(irq_mask_addr + reg * sizeof(u32)); \ -+ val &= ~(1 << bit); \ -+ bcm_writel(val, irq_mask_addr + reg * sizeof(u32)); \ -+} \ -+ \ -+static void __internal_irq_unmask_##width(unsigned int irq) \ -+{ \ -+ u32 val; \ -+ unsigned reg = (irq / 32) ^ (width/32 - 1); \ -+ unsigned bit = irq & 0x1f; \ -+ \ -+ val = bcm_readl(irq_mask_addr + reg * sizeof(u32)); \ -+ val |= (1 << bit); \ -+ bcm_writel(val, irq_mask_addr + reg * sizeof(u32)); \ - } - --static void __dispatch_internal_64(void) --{ -- u64 pending; -- static int i; -- -- pending = bcm_readq(irq_stat_addr) & bcm_readq(irq_mask_addr); -- -- if (!pending) -- return ; -- -- while (1) { -- int to_call = i; -- -- i = (i + 1) & 0x3f; -- if (pending & (1ull << to_call)) { -- handle_internal(to_call); -- break; -- } -- } --} -+BUILD_IPIC_INTERNAL(32); -+BUILD_IPIC_INTERNAL(64); - - asmlinkage void plat_irq_dispatch(void) - { -@@ -128,42 +146,6 @@ asmlinkage void plat_irq_dispatch(void) - * internal IRQs operations: only mask/unmask on PERF irq mask - * register. - */ --static void __internal_irq_mask_32(unsigned int irq) --{ -- u32 mask; -- -- mask = bcm_readl(irq_mask_addr); -- mask &= ~(1 << irq); -- bcm_writel(mask, irq_mask_addr); --} -- --static void __internal_irq_mask_64(unsigned int irq) --{ -- u64 mask; -- -- mask = bcm_readq(irq_mask_addr); -- mask &= ~(1ull << irq); -- bcm_writeq(mask, irq_mask_addr); --} -- --static void __internal_irq_unmask_32(unsigned int irq) --{ -- u32 mask; -- -- mask = bcm_readl(irq_mask_addr); -- mask |= (1 << irq); -- bcm_writel(mask, irq_mask_addr); --} -- --static void __internal_irq_unmask_64(unsigned int irq) --{ -- u64 mask; -- -- mask = bcm_readq(irq_mask_addr); -- mask |= (1ull << irq); -- bcm_writeq(mask, irq_mask_addr); --} -- - static void bcm63xx_internal_irq_mask(struct irq_data *d) - { - internal_irq_mask(d->irq - IRQ_INTERNAL_BASE); |