summaryrefslogtreecommitdiffstats
path: root/arch/mips/kernel/traps.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/kernel/traps.c')
-rw-r--r--arch/mips/kernel/traps.c122
1 files changed, 54 insertions, 68 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 8119ac2fdfc..51706d6dd5b 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -15,6 +15,7 @@
#include <linux/bug.h>
#include <linux/compiler.h>
#include <linux/context_tracking.h>
+#include <linux/cpu_pm.h>
#include <linux/kexec.h>
#include <linux/init.h>
#include <linux/kernel.h>
@@ -370,9 +371,6 @@ void __noreturn die(const char *str, struct pt_regs *regs)
{
static int die_counter;
int sig = SIGSEGV;
-#ifdef CONFIG_MIPS_MT_SMTC
- unsigned long dvpret;
-#endif /* CONFIG_MIPS_MT_SMTC */
oops_enter();
@@ -382,13 +380,7 @@ void __noreturn die(const char *str, struct pt_regs *regs)
console_verbose();
raw_spin_lock_irq(&die_lock);
-#ifdef CONFIG_MIPS_MT_SMTC
- dvpret = dvpe();
-#endif /* CONFIG_MIPS_MT_SMTC */
bust_spinlocks(1);
-#ifdef CONFIG_MIPS_MT_SMTC
- mips_mt_regdump(dvpret);
-#endif /* CONFIG_MIPS_MT_SMTC */
printk("%s[#%d]:\n", str, ++die_counter);
show_registers(regs);
@@ -712,10 +704,12 @@ int process_fpemu_return(int sig, void __user *fault_addr)
si.si_addr = fault_addr;
si.si_signo = sig;
if (sig == SIGSEGV) {
+ down_read(&current->mm->mmap_sem);
if (find_vma(current->mm, (unsigned long)fault_addr))
si.si_code = SEGV_ACCERR;
else
si.si_code = SEGV_MAPERR;
+ up_read(&current->mm->mmap_sem);
} else {
si.si_code = BUS_ADRERR;
}
@@ -1759,19 +1753,6 @@ static void *set_vi_srs_handler(int n, vi_handler_t addr, int srs)
extern char rollback_except_vec_vi;
char *vec_start = using_rollback_handler() ?
&rollback_except_vec_vi : &except_vec_vi;
-#ifdef CONFIG_MIPS_MT_SMTC
- /*
- * We need to provide the SMTC vectored interrupt handler
- * not only with the address of the handler, but with the
- * Status.IM bit to be masked before going there.
- */
- extern char except_vec_vi_mori;
-#if defined(CONFIG_CPU_MICROMIPS) || defined(CONFIG_CPU_BIG_ENDIAN)
- const int mori_offset = &except_vec_vi_mori - vec_start + 2;
-#else
- const int mori_offset = &except_vec_vi_mori - vec_start;
-#endif
-#endif /* CONFIG_MIPS_MT_SMTC */
#if defined(CONFIG_CPU_MICROMIPS) || defined(CONFIG_CPU_BIG_ENDIAN)
const int lui_offset = &except_vec_vi_lui - vec_start + 2;
const int ori_offset = &except_vec_vi_ori - vec_start + 2;
@@ -1795,12 +1776,6 @@ static void *set_vi_srs_handler(int n, vi_handler_t addr, int srs)
#else
handler_len);
#endif
-#ifdef CONFIG_MIPS_MT_SMTC
- BUG_ON(n > 7); /* Vector index %d exceeds SMTC maximum. */
-
- h = (u16 *)(b + mori_offset);
- *h = (0x100 << n);
-#endif /* CONFIG_MIPS_MT_SMTC */
h = (u16 *)(b + lui_offset);
*h = (handler >> 16) & 0xffff;
h = (u16 *)(b + ori_offset);
@@ -1865,32 +1840,16 @@ static int __init ulri_disable(char *s)
}
__setup("noulri", ulri_disable);
-void per_cpu_trap_init(bool is_boot_cpu)
+/* configure STATUS register */
+static void configure_status(void)
{
- unsigned int cpu = smp_processor_id();
- unsigned int status_set = ST0_CU0;
- unsigned int hwrena = cpu_hwrena_impl_bits;
-#ifdef CONFIG_MIPS_MT_SMTC
- int secondaryTC = 0;
- int bootTC = (cpu == 0);
-
- /*
- * Only do per_cpu_trap_init() for first TC of Each VPE.
- * Note that this hack assumes that the SMTC init code
- * assigns TCs consecutively and in ascending order.
- */
-
- if (((read_c0_tcbind() & TCBIND_CURTC) != 0) &&
- ((read_c0_tcbind() & TCBIND_CURVPE) == cpu_data[cpu - 1].vpe_id))
- secondaryTC = 1;
-#endif /* CONFIG_MIPS_MT_SMTC */
-
/*
* Disable coprocessors and select 32-bit or 64-bit addressing
* and the 16/32 or 32/32 FPR register model. Reset the BEV
* flag that some firmware may have left set and the TS bit (for
* IP27). Set XX for ISA IV code to work.
*/
+ unsigned int status_set = ST0_CU0;
#ifdef CONFIG_64BIT
status_set |= ST0_FR|ST0_KX|ST0_SX|ST0_UX;
#endif
@@ -1901,6 +1860,12 @@ void per_cpu_trap_init(bool is_boot_cpu)
change_c0_status(ST0_CU|ST0_MX|ST0_RE|ST0_FR|ST0_BEV|ST0_TS|ST0_KX|ST0_SX|ST0_UX,
status_set);
+}
+
+/* configure HWRENA register */
+static void configure_hwrena(void)
+{
+ unsigned int hwrena = cpu_hwrena_impl_bits;
if (cpu_has_mips_r2)
hwrena |= 0x0000000f;
@@ -1910,11 +1875,10 @@ void per_cpu_trap_init(bool is_boot_cpu)
if (hwrena)
write_c0_hwrena(hwrena);
+}
-#ifdef CONFIG_MIPS_MT_SMTC
- if (!secondaryTC) {
-#endif /* CONFIG_MIPS_MT_SMTC */
-
+static void configure_exception_vector(void)
+{
if (cpu_has_veic || cpu_has_vint) {
unsigned long sr = set_c0_status(ST0_BEV);
write_c0_ebase(ebase);
@@ -1930,6 +1894,16 @@ void per_cpu_trap_init(bool is_boot_cpu)
} else
set_c0_cause(CAUSEF_IV);
}
+}
+
+void per_cpu_trap_init(bool is_boot_cpu)
+{
+ unsigned int cpu = smp_processor_id();
+
+ configure_status();
+ configure_hwrena();
+
+ configure_exception_vector();
/*
* Before R2 both interrupt numbers were fixed to 7, so on R2 only:
@@ -1949,10 +1923,6 @@ void per_cpu_trap_init(bool is_boot_cpu)
cp0_perfcount_irq = -1;
}
-#ifdef CONFIG_MIPS_MT_SMTC
- }
-#endif /* CONFIG_MIPS_MT_SMTC */
-
if (!cpu_data[cpu].asid_cache)
cpu_data[cpu].asid_cache = ASID_FIRST_VERSION;
@@ -1961,23 +1931,10 @@ void per_cpu_trap_init(bool is_boot_cpu)
BUG_ON(current->mm);
enter_lazy_tlb(&init_mm, current);
-#ifdef CONFIG_MIPS_MT_SMTC
- if (bootTC) {
-#endif /* CONFIG_MIPS_MT_SMTC */
/* Boot CPU's cache setup in setup_arch(). */
if (!is_boot_cpu)
cpu_cache_init();
tlb_init();
-#ifdef CONFIG_MIPS_MT_SMTC
- } else if (!secondaryTC) {
- /*
- * First TC in non-boot VPE must do subset of tlb_init()
- * for MMU countrol registers.
- */
- write_c0_pagemask(PM_DEFAULT_MASK);
- write_c0_wired(0);
- }
-#endif /* CONFIG_MIPS_MT_SMTC */
TLBMISS_HANDLER_SETUP();
}
@@ -2185,3 +2142,32 @@ void __init trap_init(void)
cu2_notifier(default_cu2_call, 0x80000000); /* Run last */
}
+
+static int trap_pm_notifier(struct notifier_block *self, unsigned long cmd,
+ void *v)
+{
+ switch (cmd) {
+ case CPU_PM_ENTER_FAILED:
+ case CPU_PM_EXIT:
+ configure_status();
+ configure_hwrena();
+ configure_exception_vector();
+
+ /* Restore register with CPU number for TLB handlers */
+ TLBMISS_HANDLER_RESTORE();
+
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block trap_pm_notifier_block = {
+ .notifier_call = trap_pm_notifier,
+};
+
+static int __init trap_pm_init(void)
+{
+ return cpu_pm_register_notifier(&trap_pm_notifier_block);
+}
+arch_initcall(trap_pm_init);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-27 03:20:21 +0000