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Diffstat (limited to 'arch/mips/kernel/traps.c')
-rw-r--r--arch/mips/kernel/traps.c76
1 files changed, 45 insertions, 31 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index c8e291c83057..632bce1bf420 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -295,7 +295,8 @@ void show_regs(struct pt_regs *regs)
if (1 <= cause && cause <= 5)
printk("BadVA : %0*lx\n", field, regs->cp0_badvaddr);
- printk("PrId : %08x\n", read_c0_prid());
+ printk("PrId : %08x (%s)\n", read_c0_prid(),
+ cpu_name_string());
}
void show_registers(struct pt_regs *regs)
@@ -606,6 +607,8 @@ asmlinkage void do_ov(struct pt_regs *regs)
*/
asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
{
+ siginfo_t info;
+
die_if_kernel("FP exception in kernel code", regs);
if (fcr31 & FPU_CSR_UNI_X) {
@@ -625,7 +628,7 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
lose_fpu(1);
/* Run the emulator */
- sig = fpu_emulator_cop1Handler (regs, &current->thread.fpu, 1);
+ sig = fpu_emulator_cop1Handler(regs, &current->thread.fpu, 1);
/*
* We can't allow the emulated instruction to leave any of
@@ -641,9 +644,22 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31)
force_sig(sig, current);
return;
- }
-
- force_sig(SIGFPE, current);
+ } else if (fcr31 & FPU_CSR_INV_X)
+ info.si_code = FPE_FLTINV;
+ else if (fcr31 & FPU_CSR_DIV_X)
+ info.si_code = FPE_FLTDIV;
+ else if (fcr31 & FPU_CSR_OVF_X)
+ info.si_code = FPE_FLTOVF;
+ else if (fcr31 & FPU_CSR_UDF_X)
+ info.si_code = FPE_FLTUND;
+ else if (fcr31 & FPU_CSR_INE_X)
+ info.si_code = FPE_FLTRES;
+ else
+ info.si_code = __SI_FAULT;
+ info.si_signo = SIGFPE;
+ info.si_errno = 0;
+ info.si_addr = (void __user *) regs->cp0_epc;
+ force_sig_info(SIGFPE, &info, current);
}
asmlinkage void do_bp(struct pt_regs *regs)
@@ -939,7 +955,7 @@ asmlinkage void do_reserved(struct pt_regs *regs)
*/
static inline void parity_protection_init(void)
{
- switch (current_cpu_data.cputype) {
+ switch (current_cpu_type()) {
case CPU_24K:
case CPU_34K:
case CPU_5KC:
@@ -1035,19 +1051,11 @@ void ejtag_exception_handler(struct pt_regs *regs)
/*
* NMI exception handler.
*/
-void nmi_exception_handler(struct pt_regs *regs)
+NORET_TYPE void ATTRIB_NORET nmi_exception_handler(struct pt_regs *regs)
{
-#ifdef CONFIG_MIPS_MT_SMTC
- unsigned long dvpret = dvpe();
bust_spinlocks(1);
printk("NMI taken!!!!\n");
- mips_mt_regdump(dvpret);
-#else
- bust_spinlocks(1);
- printk("NMI taken!!!!\n");
-#endif /* CONFIG_MIPS_MT_SMTC */
die("NMI", regs);
- while(1) ;
}
#define VECTORSPACING 0x100 /* for EI/VI mode */
@@ -1068,8 +1076,8 @@ void *set_except_vector(int n, void *addr)
exception_handlers[n] = handler;
if (n == 0 && cpu_has_divec) {
- *(volatile u32 *)(ebase + 0x200) = 0x08000000 |
- (0x03ffffff & (handler >> 2));
+ *(u32 *)(ebase + 0x200) = 0x08000000 |
+ (0x03ffffff & (handler >> 2));
flush_icache_range(ebase + 0x200, ebase + 0x204);
}
return (void *)old_handler;
@@ -1158,11 +1166,11 @@ static void *set_vi_srs_handler(int n, vi_handler_t addr, int srs)
if (cpu_has_veic) {
if (board_bind_eic_interrupt)
- board_bind_eic_interrupt (n, srs);
+ board_bind_eic_interrupt(n, srs);
} else if (cpu_has_vint) {
/* SRSMap is only defined if shadow sets are implemented */
if (mips_srs_max() > 1)
- change_c0_srsmap (0xf << n*4, srs << n*4);
+ change_c0_srsmap(0xf << n*4, srs << n*4);
}
if (srs == 0) {
@@ -1191,10 +1199,10 @@ static void *set_vi_srs_handler(int n, vi_handler_t addr, int srs)
* Sigh... panicing won't help as the console
* is probably not configured :(
*/
- panic ("VECTORSPACING too small");
+ panic("VECTORSPACING too small");
}
- memcpy (b, &except_vec_vi, handler_len);
+ memcpy(b, &except_vec_vi, handler_len);
#ifdef CONFIG_MIPS_MT_SMTC
BUG_ON(n > 7); /* Vector index %d exceeds SMTC maximum. */
@@ -1363,9 +1371,9 @@ void __init per_cpu_trap_init(void)
#endif /* CONFIG_MIPS_MT_SMTC */
if (cpu_has_veic || cpu_has_vint) {
- write_c0_ebase (ebase);
+ write_c0_ebase(ebase);
/* Setting vector spacing enables EI/VI mode */
- change_c0_intctl (0x3e0, VECTORSPACING);
+ change_c0_intctl(0x3e0, VECTORSPACING);
}
if (cpu_has_divec) {
if (cpu_has_mipsmt) {
@@ -1383,8 +1391,8 @@ void __init per_cpu_trap_init(void)
* o read IntCtl.IPPCI to determine the performance counter interrupt
*/
if (cpu_has_mips_r2) {
- cp0_compare_irq = (read_c0_intctl () >> 29) & 7;
- cp0_perfcount_irq = (read_c0_intctl () >> 26) & 7;
+ cp0_compare_irq = (read_c0_intctl() >> 29) & 7;
+ cp0_perfcount_irq = (read_c0_intctl() >> 26) & 7;
if (cp0_perfcount_irq == cp0_compare_irq)
cp0_perfcount_irq = -1;
} else {
@@ -1422,14 +1430,17 @@ void __init per_cpu_trap_init(void)
}
/* Install CPU exception handler */
-void __init set_handler (unsigned long offset, void *addr, unsigned long size)
+void __init set_handler(unsigned long offset, void *addr, unsigned long size)
{
memcpy((void *)(ebase + offset), addr, size);
flush_icache_range(ebase + offset, ebase + offset + size);
}
+static char panic_null_cerr[] __initdata =
+ "Trying to set NULL cache error exception handler";
+
/* Install uncached CPU exception handler */
-void __init set_uncached_handler (unsigned long offset, void *addr, unsigned long size)
+void __init set_uncached_handler(unsigned long offset, void *addr, unsigned long size)
{
#ifdef CONFIG_32BIT
unsigned long uncached_ebase = KSEG1ADDR(ebase);
@@ -1438,6 +1449,9 @@ void __init set_uncached_handler (unsigned long offset, void *addr, unsigned lon
unsigned long uncached_ebase = TO_UNCAC(ebase);
#endif
+ if (!addr)
+ panic(panic_null_cerr);
+
memcpy((void *)(uncached_ebase + offset), addr, size);
}
@@ -1457,7 +1471,7 @@ void __init trap_init(void)
unsigned long i;
if (cpu_has_veic || cpu_has_vint)
- ebase = (unsigned long) alloc_bootmem_low_pages (0x200 + VECTORSPACING*64);
+ ebase = (unsigned long) alloc_bootmem_low_pages(0x200 + VECTORSPACING*64);
else
ebase = CAC_BASE;
@@ -1483,7 +1497,7 @@ void __init trap_init(void)
* destination.
*/
if (cpu_has_ejtag && board_ejtag_handler_setup)
- board_ejtag_handler_setup ();
+ board_ejtag_handler_setup();
/*
* Only some CPUs have the watch exceptions.
@@ -1536,8 +1550,8 @@ void __init trap_init(void)
set_except_vector(12, handle_ov);
set_except_vector(13, handle_tr);
- if (current_cpu_data.cputype == CPU_R6000 ||
- current_cpu_data.cputype == CPU_R6000A) {
+ if (current_cpu_type() == CPU_R6000 ||
+ current_cpu_type() == CPU_R6000A) {
/*
* The R6000 is the only R-series CPU that features a machine
* check exception (similar to the R4000 cache error) and
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 09:44:30 +0000