From: Maxime Bizon Date: Fri, 4 Nov 2011 18:09:33 +0000 (+0100) Subject: MIPS: BCM63XX: Handle 64 bits irq stat register in irq code. X-Git-Tag: v3.3-rc1~65^2^4~6 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=71a43927b3bfe1a42cbf7bb174b170f06fa00a1a;p=platform%2Fkernel%2Flinux-3.10.git MIPS: BCM63XX: Handle 64 bits irq stat register in irq code. bcm6368 has larger irq registers, prepare for this. Signed-off-by: Maxime Bizon Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2898/ Signed-off-by: Ralf Baechle --- diff --git a/arch/mips/bcm63xx/irq.c b/arch/mips/bcm63xx/irq.c index cdf352b..11f8942 100644 --- a/arch/mips/bcm63xx/irq.c +++ b/arch/mips/bcm63xx/irq.c @@ -20,11 +20,17 @@ #include static void __dispatch_internal(void) __maybe_unused; +static void __dispatch_internal_64(void) __maybe_unused; +static void __internal_irq_mask_32(unsigned int irq) __maybe_unused; +static void __internal_irq_mask_64(unsigned int irq) __maybe_unused; +static void __internal_irq_unmask_32(unsigned int irq) __maybe_unused; +static void __internal_irq_unmask_64(unsigned int irq) __maybe_unused; #ifndef BCMCPU_RUNTIME_DETECT #ifdef CONFIG_BCM63XX_CPU_6338 #define irq_stat_reg PERF_IRQSTAT_6338_REG #define irq_mask_reg PERF_IRQMASK_6338_REG +#define irq_bits 32 #define is_ext_irq_cascaded 0 #define ext_irq_start 0 #define ext_irq_end 0 @@ -32,6 +38,7 @@ static void __dispatch_internal(void) __maybe_unused; #ifdef CONFIG_BCM63XX_CPU_6345 #define irq_stat_reg PERF_IRQSTAT_6345_REG #define irq_mask_reg PERF_IRQMASK_6345_REG +#define irq_bits 32 #define is_ext_irq_cascaded 0 #define ext_irq_start 0 #define ext_irq_end 0 @@ -39,7 +46,7 @@ static void __dispatch_internal(void) __maybe_unused; #ifdef CONFIG_BCM63XX_CPU_6348 #define irq_stat_reg PERF_IRQSTAT_6348_REG #define irq_mask_reg PERF_IRQMASK_6348_REG -#define dispatch_internal __dispatch_internal +#define irq_bits 32 #define is_ext_irq_cascaded 0 #define ext_irq_start 0 #define ext_irq_end 0 @@ -47,13 +54,21 @@ static void __dispatch_internal(void) __maybe_unused; #ifdef CONFIG_BCM63XX_CPU_6358 #define irq_stat_reg PERF_IRQSTAT_6358_REG #define irq_mask_reg PERF_IRQMASK_6358_REG -#define dispatch_internal __dispatch_internal +#define irq_bits 32 #define is_ext_irq_cascaded 1 #define ext_irq_start (BCM_6358_EXT_IRQ0 - IRQ_INTERNAL_BASE) #define ext_irq_end (BCM_6358_EXT_IRQ3 - IRQ_INTERNAL_BASE) #endif -#define dispatch_internal __dispatch_internal +#if irq_bits == 32 +#define dispatch_internal __dispatch_internal +#define internal_irq_mask __internal_irq_mask_32 +#define internal_irq_unmask __internal_irq_unmask_32 +#else +#define dispatch_internal __dispatch_internal_64 +#define internal_irq_mask __internal_irq_mask_64 +#define internal_irq_unmask __internal_irq_unmask_64 +#endif #define irq_stat_addr (bcm63xx_regset_address(RSET_PERF) + irq_stat_reg) #define irq_mask_addr (bcm63xx_regset_address(RSET_PERF) + irq_mask_reg) @@ -67,9 +82,13 @@ static u32 irq_stat_addr, irq_mask_addr; static void (*dispatch_internal)(void); static int is_ext_irq_cascaded; static unsigned int ext_irq_start, ext_irq_end; +static void (*internal_irq_mask)(unsigned int irq); +static void (*internal_irq_unmask)(unsigned int irq); static void bcm63xx_init_irq(void) { + int irq_bits; + irq_stat_addr = bcm63xx_regset_address(RSET_PERF); irq_mask_addr = bcm63xx_regset_address(RSET_PERF); @@ -77,18 +96,22 @@ static void bcm63xx_init_irq(void) case BCM6338_CPU_ID: irq_stat_addr += PERF_IRQSTAT_6338_REG; irq_mask_addr += PERF_IRQMASK_6338_REG; + irq_bits = 32; break; case BCM6345_CPU_ID: irq_stat_addr += PERF_IRQSTAT_6345_REG; irq_mask_addr += PERF_IRQMASK_6345_REG; + irq_bits = 32; break; case BCM6348_CPU_ID: irq_stat_addr += PERF_IRQSTAT_6348_REG; irq_mask_addr += PERF_IRQMASK_6348_REG; + irq_bits = 32; break; case BCM6358_CPU_ID: irq_stat_addr += PERF_IRQSTAT_6358_REG; irq_mask_addr += PERF_IRQMASK_6358_REG; + irq_bits = 32; is_ext_irq_cascaded = 1; ext_irq_start = BCM_6358_EXT_IRQ0 - IRQ_INTERNAL_BASE; ext_irq_end = BCM_6358_EXT_IRQ3 - IRQ_INTERNAL_BASE; @@ -97,7 +120,15 @@ static void bcm63xx_init_irq(void) BUG(); } - dispatch_internal = __dispatch_internal; + if (irq_bits == 32) { + dispatch_internal = __dispatch_internal; + internal_irq_mask = __internal_irq_mask_32; + internal_irq_unmask = __internal_irq_unmask_32; + } else { + dispatch_internal = __dispatch_internal_64; + internal_irq_mask = __internal_irq_mask_64; + internal_irq_unmask = __internal_irq_unmask_64; + } } #endif /* ! BCMCPU_RUNTIME_DETECT */ @@ -137,6 +168,27 @@ static void __dispatch_internal(void) } } +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; + } + } +} + asmlinkage void plat_irq_dispatch(void) { u32 cause; @@ -168,7 +220,7 @@ asmlinkage void plat_irq_dispatch(void) * internal IRQs operations: only mask/unmask on PERF irq mask * register. */ -static void internal_irq_mask(unsigned int irq) +static void __internal_irq_mask_32(unsigned int irq) { u32 mask; @@ -177,7 +229,16 @@ static void internal_irq_mask(unsigned int irq) bcm_writel(mask, irq_mask_addr); } -static void internal_irq_unmask(unsigned int irq) +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; @@ -186,6 +247,15 @@ static void internal_irq_unmask(unsigned int 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);