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-rw-r--r--target/linux/amazon/files/arch/mips/amazon/interrupt.c7
-rw-r--r--target/linux/amazon/files/arch/mips/amazon/setup.c52
-rw-r--r--target/linux/amazon/patches-2.6.30/220-fix_timer.patch93
3 files changed, 34 insertions, 118 deletions
diff --git a/target/linux/amazon/files/arch/mips/amazon/interrupt.c b/target/linux/amazon/files/arch/mips/amazon/interrupt.c
index e61ccdfc3d..17980fb118 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 8c3c86c0fa..af067853ca 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);
diff --git a/target/linux/amazon/patches-2.6.30/220-fix_timer.patch b/target/linux/amazon/patches-2.6.30/220-fix_timer.patch
deleted file mode 100644
index 6408b88f91..0000000000
--- a/target/linux/amazon/patches-2.6.30/220-fix_timer.patch
+++ /dev/null
@@ -1,93 +0,0 @@
---- a/arch/mips/amazon/setup.c
-+++ b/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);
---- a/arch/mips/amazon/interrupt.c
-+++ b/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;
-+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 20:47:50 +0000