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[PATCH v2,4/9] MIPS: Add microMIPS versions of breakpoints, BUG, etc. | |
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From: "Steven J. Hill" <sjhill@xxxxxxxx>
Add breakpoints, BUG() functions, DSP instruction masks, and
debug messages for microMIPS. Also add '.insn' directive to
a number of files that must assemble correctly when using the
microMIPS or MIPS16e instruction sets.
Signed-off-by: Steven J. Hill <sjhill@xxxxxxxx>
---
arch/mips/include/asm/break.h | 8 ++++++++
arch/mips/include/asm/bug.h | 8 ++++++++
arch/mips/include/asm/dsp.h | 4 ++++
arch/mips/include/asm/futex.h | 4 ++++
arch/mips/include/asm/paccess.h | 2 ++
arch/mips/include/asm/uaccess.h | 14 ++++++++++++--
arch/mips/kernel/proc.c | 27 ++++++++++++++-------------
arch/mips/kernel/ptrace.c | 4 ++++
arch/mips/mm/fault.c | 2 ++
9 files changed, 58 insertions(+), 15 deletions(-)
diff --git a/arch/mips/include/asm/break.h b/arch/mips/include/asm/break.h
index 9161e68..56758eb 100644
--- a/arch/mips/include/asm/break.h
+++ b/arch/mips/include/asm/break.h
@@ -27,6 +27,14 @@
#define BRK_STACKOVERFLOW 9 /* For Ada stackchecking */
#define BRK_NORLD 10 /* No rld found - not used by Linux/MIPS */
#define _BRK_THREADBP 11 /* For threads, user bp (used by debuggers) */
+
+/* microMIPS definitions */
+#define MM_BRK_BUG 12 /* Used by BUG() */
+#define MM_BRK_KDB 13 /* Used in KDB_ENTER() */
+#define MM_BRK_MEMU 14 /* Used by FPU emulator */
+#define MM_BRK_MULOVF 15 /* Multiply overflow */
+
+/* MIPS32/64 definitions */
#define BRK_BUG 512 /* Used by BUG() */
#define BRK_KDB 513 /* Used in KDB_ENTER() */
#define BRK_MEMU 514 /* Used by FPU emulator */
diff --git a/arch/mips/include/asm/bug.h b/arch/mips/include/asm/bug.h
index 540c98a..7afa2e5 100644
--- a/arch/mips/include/asm/bug.h
+++ b/arch/mips/include/asm/bug.h
@@ -10,7 +10,11 @@
static inline void __noreturn BUG(void)
{
+#ifdef CONFIG_CPU_MICROMIPS
+ __asm__ __volatile__("break %0" : : "i" (MM_BRK_BUG));
+#else
__asm__ __volatile__("break %0" : : "i" (BRK_BUG));
+#endif
unreachable();
}
@@ -27,7 +31,11 @@ static inline void __BUG_ON(unsigned long condition)
return;
}
__asm__ __volatile__("tne $0, %0, %1"
+#ifdef CONFIG_CPU_MICROMIPS
+ : : "r" (condition), "i" (MM_BRK_BUG));
+#else
: : "r" (condition), "i" (BRK_BUG));
+#endif
}
#define BUG_ON(C) __BUG_ON((unsigned long)(C))
diff --git a/arch/mips/include/asm/dsp.h b/arch/mips/include/asm/dsp.h
index e9bfc08..3149b30 100644
--- a/arch/mips/include/asm/dsp.h
+++ b/arch/mips/include/asm/dsp.h
@@ -16,7 +16,11 @@
#include <asm/mipsregs.h>
#define DSP_DEFAULT 0x00000000
+#ifdef CONFIG_CPU_MICROMIPS
+#define DSP_MASK 0x7f
+#else
#define DSP_MASK 0x3ff
+#endif
#define __enable_dsp_hazard() \
do { \
diff --git a/arch/mips/include/asm/futex.h b/arch/mips/include/asm/futex.h
index 6ebf173..007adca 100644
--- a/arch/mips/include/asm/futex.h
+++ b/arch/mips/include/asm/futex.h
@@ -31,6 +31,7 @@
" beqzl $1, 1b \n" \
__WEAK_LLSC_MB \
"3: \n" \
+ " .insn \n" \
" .set pop \n" \
" .set mips0 \n" \
" .section .fixup,\"ax\" \n" \
@@ -57,6 +58,7 @@
" beqz $1, 1b \n" \
__WEAK_LLSC_MB \
"3: \n" \
+ " .insn \n" \
" .set pop \n" \
" .set mips0 \n" \
" .section .fixup,\"ax\" \n" \
@@ -156,6 +158,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
" beqzl $1, 1b \n"
__WEAK_LLSC_MB
"3: \n"
+ " .insn \n"
" .set pop \n"
" .section .fixup,\"ax\" \n"
"4: li %0, %6 \n"
@@ -183,6 +186,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
" beqz $1, 1b \n"
__WEAK_LLSC_MB
"3: \n"
+ " .insn \n"
" .set pop \n"
" .section .fixup,\"ax\" \n"
"4: li %0, %6 \n"
diff --git a/arch/mips/include/asm/paccess.h b/arch/mips/include/asm/paccess.h
index 9ce5a1e..f479742 100644
--- a/arch/mips/include/asm/paccess.h
+++ b/arch/mips/include/asm/paccess.h
@@ -56,6 +56,7 @@ struct __large_pstruct { unsigned long buf[100]; };
"1:\t" insn "\t%1,%2\n\t" \
"move\t%0,$0\n" \
"2:\n\t" \
+ ".insn\n\t" \
".section\t.fixup,\"ax\"\n" \
"3:\tli\t%0,%3\n\t" \
"move\t%1,$0\n\t" \
@@ -94,6 +95,7 @@ extern void __get_dbe_unknown(void);
"1:\t" insn "\t%1,%2\n\t" \
"move\t%0,$0\n" \
"2:\n\t" \
+ ".insn\n\t" \
".section\t.fixup,\"ax\"\n" \
"3:\tli\t%0,%3\n\t" \
"j\t2b\n\t" \
diff --git a/arch/mips/include/asm/uaccess.h b/arch/mips/include/asm/uaccess.h
index 653a412..9510015 100644
--- a/arch/mips/include/asm/uaccess.h
+++ b/arch/mips/include/asm/uaccess.h
@@ -261,6 +261,7 @@ do { \
__asm__ __volatile__( \
"1: " insn " %1, %3 \n" \
"2: \n" \
+ " .insn \n" \
" .section .fixup,\"ax\" \n" \
"3: li %0, %4 \n" \
" j 2b \n" \
@@ -287,7 +288,9 @@ do { \
__asm__ __volatile__( \
"1: lw %1, (%3) \n" \
"2: lw %D1, 4(%3) \n" \
- "3: .section .fixup,\"ax\" \n" \
+ "3: \n" \
+ " .insn \n" \
+ " .section .fixup,\"ax\" \n" \
"4: li %0, %4 \n" \
" move %1, $0 \n" \
" move %D1, $0 \n" \
@@ -355,6 +358,7 @@ do { \
__asm__ __volatile__( \
"1: " insn " %z2, %3 # __put_user_asm\n" \
"2: \n" \
+ " .insn \n" \
" .section .fixup,\"ax\" \n" \
"3: li %0, %4 \n" \
" j 2b \n" \
@@ -373,6 +377,7 @@ do { \
"1: sw %2, (%3) # __put_user_asm_ll32 \n" \
"2: sw %D2, 4(%3) \n" \
"3: \n" \
+ " .insn \n" \
" .section .fixup,\"ax\" \n" \
"4: li %0, %4 \n" \
" j 3b \n" \
@@ -524,6 +529,7 @@ do { \
__asm__ __volatile__( \
"1: " insn " %1, %3 \n" \
"2: \n" \
+ " .insn \n" \
" .section .fixup,\"ax\" \n" \
"3: li %0, %4 \n" \
" j 2b \n" \
@@ -549,7 +555,9 @@ do { \
"1: ulw %1, (%3) \n" \
"2: ulw %D1, 4(%3) \n" \
" move %0, $0 \n" \
- "3: .section .fixup,\"ax\" \n" \
+ "3: \n" \
+ " .insn \n" \
+ " .section .fixup,\"ax\" \n" \
"4: li %0, %4 \n" \
" move %1, $0 \n" \
" move %D1, $0 \n" \
@@ -616,6 +624,7 @@ do { \
__asm__ __volatile__( \
"1: " insn " %z2, %3 # __put_user_unaligned_asm\n" \
"2: \n" \
+ " .insn \n" \
" .section .fixup,\"ax\" \n" \
"3: li %0, %4 \n" \
" j 2b \n" \
@@ -634,6 +643,7 @@ do { \
"1: sw %2, (%3) # __put_user_unaligned_asm_ll32 \n" \
"2: sw %D2, 4(%3) \n" \
"3: \n" \
+ " .insn \n" \
" .section .fixup,\"ax\" \n" \
"4: li %0, %4 \n" \
" j 3b \n" \
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index e309665..2c0f781 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -41,29 +41,30 @@ static int show_cpuinfo(struct seq_file *m, void *v)
seq_printf(m, "processor\t\t: %ld\n", n);
sprintf(fmt, "cpu model\t\t: %%s V%%d.%%d%s\n",
- cpu_data[n].options & MIPS_CPU_FPU ? " FPU V%d.%d" : "");
+ cpu_data[n].options & MIPS_CPU_FPU ? " FPU V%d.%d" : "");
seq_printf(m, fmt, __cpu_name[n],
- (version >> 4) & 0x0f, version & 0x0f,
- (fp_vers >> 4) & 0x0f, fp_vers & 0x0f);
+ (version >> 4) & 0x0f, version & 0x0f,
+ (fp_vers >> 4) & 0x0f, fp_vers & 0x0f);
seq_printf(m, "BogoMIPS\t\t: %u.%02u\n",
- cpu_data[n].udelay_val / (500000/HZ),
- (cpu_data[n].udelay_val / (5000/HZ)) % 100);
+ cpu_data[n].udelay_val / (500000/HZ),
+ (cpu_data[n].udelay_val / (5000/HZ)) % 100);
seq_printf(m, "wait instruction\t: %s\n", cpu_wait ? "yes" : "no");
seq_printf(m, "microsecond timers\t: %s\n",
- cpu_has_counter ? "yes" : "no");
+ cpu_has_counter ? "yes" : "no");
seq_printf(m, "tlb_entries\t\t: %d\n", cpu_data[n].tlbsize);
seq_printf(m, "extra interrupt vector\t: %s\n",
- cpu_has_divec ? "yes" : "no");
+ cpu_has_divec ? "yes" : "no");
seq_printf(m, "hardware watchpoint\t: %s",
- cpu_has_watch ? "yes, " : "no\n");
+ cpu_has_watch ? "yes, " : "no\n");
if (cpu_has_watch) {
seq_printf(m, "count: %d, address/irw mask: [",
- cpu_data[n].watch_reg_count);
+ cpu_data[n].watch_reg_count);
for (i = 0; i < cpu_data[n].watch_reg_count; i++)
seq_printf(m, "%s0x%04x", i ? ", " : "" ,
- cpu_data[n].watch_reg_masks[i]);
+ cpu_data[n].watch_reg_masks[i]);
seq_printf(m, "]\n");
}
+ seq_printf(m, "microMIPS\t\t: %s\n", cpu_has_mmips ? "yes" : "no");
seq_printf(m, "ASEs implemented\t:%s%s%s%s%s%s\n",
cpu_has_mips16 ? " mips16" : "",
cpu_has_mdmx ? " mdmx" : "",
@@ -73,13 +74,13 @@ static int show_cpuinfo(struct seq_file *m, void *v)
cpu_has_mipsmt ? " mt" : ""
);
seq_printf(m, "shadow register sets\t: %d\n",
- cpu_data[n].srsets);
+ cpu_data[n].srsets);
seq_printf(m, "kscratch registers\t: %d\n",
- hweight8(cpu_data[n].kscratch_mask));
+ hweight8(cpu_data[n].kscratch_mask));
seq_printf(m, "core\t\t\t: %d\n", cpu_data[n].core);
sprintf(fmt, "VCE%%c exceptions\t\t: %s\n",
- cpu_has_vce ? "%u" : "not available");
+ cpu_has_vce ? "%u" : "not available");
seq_printf(m, fmt, 'D', vced_count);
seq_printf(m, fmt, 'I', vcei_count);
seq_printf(m, "\n");
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 7c24c29..4b4bbc0 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -364,6 +364,7 @@ long arch_ptrace(struct task_struct *child, long request,
preempt_enable();
break;
}
+#ifndef CONFIG_CPU_MICROMIPS
case DSP_BASE ... DSP_BASE + 5: {
dspreg_t *dregs;
@@ -384,6 +385,7 @@ long arch_ptrace(struct task_struct *child, long request,
}
tmp = child->thread.dsp.dspcontrol;
break;
+#endif
default:
tmp = 0;
ret = -EIO;
@@ -453,6 +455,7 @@ long arch_ptrace(struct task_struct *child, long request,
case FPC_CSR:
child->thread.fpu.fcr31 = data;
break;
+#ifndef CONFIG_CPU_MICROMIPS
case DSP_BASE ... DSP_BASE + 5: {
dspreg_t *dregs;
@@ -472,6 +475,7 @@ long arch_ptrace(struct task_struct *child, long request,
}
child->thread.dsp.dspcontrol = data;
break;
+#endif
default:
/* The rest are not allowed. */
ret = -EIO;
diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index c14f6df..bae32a7 100644
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -25,6 +25,7 @@
#include <asm/uaccess.h>
#include <asm/ptrace.h>
#include <asm/highmem.h> /* For VMALLOC_END */
+#include <asm/tlbdebug.h>
#include <linux/kdebug.h>
/*
@@ -231,6 +232,7 @@ no_context:
"virtual address %0*lx, epc == %0*lx, ra == %0*lx\n",
raw_smp_processor_id(), field, address, field, regs->cp0_epc,
field, regs->regs[31]);
+ dump_tlb_all();
die("Oops", regs);
out_of_memory:
--
1.7.9.6
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