diff options
Diffstat (limited to 'target/linux/amazon/files/arch/mips')
-rw-r--r-- | target/linux/amazon/files/arch/mips/amazon/interrupt.c | 7 | ||||
-rw-r--r-- | target/linux/amazon/files/arch/mips/amazon/setup.c | 52 |
2 files changed, 34 insertions, 25 deletions
diff --git a/target/linux/amazon/files/arch/mips/amazon/interrupt.c b/target/linux/amazon/files/arch/mips/amazon/interrupt.c index e61ccdfc3..17980fb11 100644 --- a/target/linux/amazon/files/arch/mips/amazon/interrupt.c +++ b/target/linux/amazon/files/arch/mips/amazon/interrupt.c @@ -184,3 +184,10 @@ void __init arch_init_irq(void) set_irq_chip(i, &amazon_irq_type); } } + +void __cpuinit arch_fixup_c0_irqs(void) +{ + /* FIXME: check for CPUID and only do fix for specific chips/versions */ + cp0_compare_irq = CP0_LEGACY_COMPARE_IRQ; + cp0_perfcount_irq = CP0_LEGACY_PERFCNT_IRQ; +} diff --git a/target/linux/amazon/files/arch/mips/amazon/setup.c b/target/linux/amazon/files/arch/mips/amazon/setup.c index 8c3c86c0f..af067853c 100644 --- a/target/linux/amazon/files/arch/mips/amazon/setup.c +++ b/target/linux/amazon/files/arch/mips/amazon/setup.c @@ -36,6 +36,12 @@ #include <asm/amazon/irq.h> #include <asm/amazon/model.h> +static unsigned int r4k_offset; +static unsigned int r4k_cur; + +/* required in arch/mips/kernel/kspd.c */ +unsigned long cpu_khz; + extern void prom_printf(const char * fmt, ...); static void amazon_reboot_setup(void); @@ -91,35 +97,32 @@ unsigned int amazon_get_cpu_ver(void) return cpu_ver; } -void amazon_time_init(void) +static inline u32 amazon_get_counter_resolution(void) { - mips_hpt_frequency = amazon_get_cpu_hz()/2; - printk("mips_hpt_frequency:%d\n", mips_hpt_frequency); + u32 res; + __asm__ __volatile__( + ".set push\n" + ".set mips32r2\n" + ".set noreorder\n" + "rdhwr %0, $3\n" + "ehb\n" + ".set pop\n" + : "=&r" (res) + : /* no input */ + : "memory"); + instruction_hazard(); + return res; } -extern int hr_time_resolution; - -/* ISR GPTU Timer 6 for high resolution timer */ -static void amazon_timer6_interrupt(int irq, void *dev_id) +void __init plat_time_init(void) { - timer_interrupt(AMAZON_TIMER6_INT, NULL); -} - -static struct irqaction hrt_irqaction = { - .handler = amazon_timer6_interrupt, - .flags = IRQF_DISABLED, - .name = "hrt", -}; + mips_hpt_frequency = amazon_get_cpu_hz() / amazon_get_counter_resolution(); + r4k_offset = mips_hpt_frequency / HZ; + printk("mips_hpt_frequency:%d\n", mips_hpt_frequency); + printk("r4k_offset: %08x(%d)\n", r4k_offset, r4k_offset); -/* - * THe CPU counter for System timer, set to HZ - * GPTU Timer 6 for high resolution timer, set to hr_time_resolution - * Also misuse this routine to print out the CPU type and clock. - */ -void __init plat_timer_setup(struct irqaction *irq) -{ - /* cpu counter for timer interrupts */ - setup_irq(MIPS_CPU_TIMER_IRQ, irq); + r4k_cur = (read_c0_count() + r4k_offset); + write_c0_compare(r4k_cur); /* enable the timer in the PMU */ amazon_writel(amazon_readl(AMAZON_PMU_PWDCR)| AMAZON_PMU_PWDCR_GPT|AMAZON_PMU_PWDCR_FPI, AMAZON_PMU_PWDCR); @@ -147,7 +150,6 @@ void __init plat_mem_setup(void) } amazon_reboot_setup(); - board_time_init = amazon_time_init; //stop reset TPE and DFE amazon_writel(0, AMAZON_RST_REQ); |