summaryrefslogtreecommitdiff
path: root/arch/h8300/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/h8300/kernel')
-rw-r--r--arch/h8300/kernel/Makefile2
-rw-r--r--arch/h8300/kernel/entry.S19
-rw-r--r--arch/h8300/kernel/kgdb.c135
-rw-r--r--arch/h8300/kernel/setup.c8
-rw-r--r--arch/h8300/kernel/signal.c8
-rw-r--r--arch/h8300/kernel/traps.c20
6 files changed, 172 insertions, 20 deletions
diff --git a/arch/h8300/kernel/Makefile b/arch/h8300/kernel/Makefile
index 5bc33f2fc..253f8e322 100644
--- a/arch/h8300/kernel/Makefile
+++ b/arch/h8300/kernel/Makefile
@@ -17,3 +17,5 @@ obj-$(CONFIG_H8S_SIM) += sim-console.o
obj-$(CONFIG_CPU_H8300H) += ptrace_h.o
obj-$(CONFIG_CPU_H8S) += ptrace_s.o
+
+obj-$(CONFIG_KGDB) += kgdb.o
diff --git a/arch/h8300/kernel/entry.S b/arch/h8300/kernel/entry.S
index 797dfa8dd..4f67d4b35 100644
--- a/arch/h8300/kernel/entry.S
+++ b/arch/h8300/kernel/entry.S
@@ -188,7 +188,11 @@ _interrupt_redirect_table:
jsr @_interrupt_entry /* NMI */
jmp @_system_call /* TRAPA #0 (System call) */
.long 0
+#if defined(CONFIG_KGDB)
+ jmp @_kgdb_trap
+#else
.long 0
+#endif
jmp @_trace_break /* TRAPA #3 (breakpoint) */
.rept INTERRUPTS-12
jsr @_interrupt_entry
@@ -242,6 +246,7 @@ _system_call:
/* save top of frame */
mov.l sp,er0
jsr @set_esp0
+ andc #0x3f,ccr
mov.l sp,er2
and.w #0xe000,r2
mov.l @(TI_FLAGS:16,er2),er2
@@ -405,6 +410,20 @@ _nmi:
mov.l @sp+, er0
jmp @_interrupt_entry
+#if defined(CONFIG_KGDB)
+_kgdb_trap:
+ subs #4,sp
+ SAVE_ALL
+ mov.l sp,er0
+ add.l #LRET,er0
+ mov.l er0,@(LSP,sp)
+ jsr @set_esp0
+ mov.l sp,er0
+ subs #4,er0
+ jsr @h8300_kgdb_trap
+ jmp @ret_from_exception
+#endif
+
.section .bss
_sw_ksp:
.space 4
diff --git a/arch/h8300/kernel/kgdb.c b/arch/h8300/kernel/kgdb.c
new file mode 100644
index 000000000..602e478af
--- /dev/null
+++ b/arch/h8300/kernel/kgdb.c
@@ -0,0 +1,135 @@
+/*
+ * H8/300 KGDB support
+ *
+ * Copyright (C) 2015 Yoshinori Sato <ysato@users.sourceforge.jp>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/ptrace.h>
+#include <linux/kgdb.h>
+#include <linux/kdebug.h>
+#include <linux/io.h>
+
+struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] = {
+ { "er0", GDB_SIZEOF_REG, offsetof(struct pt_regs, er0) },
+ { "er1", GDB_SIZEOF_REG, offsetof(struct pt_regs, er1) },
+ { "er2", GDB_SIZEOF_REG, offsetof(struct pt_regs, er2) },
+ { "er3", GDB_SIZEOF_REG, offsetof(struct pt_regs, er3) },
+ { "er4", GDB_SIZEOF_REG, offsetof(struct pt_regs, er4) },
+ { "er5", GDB_SIZEOF_REG, offsetof(struct pt_regs, er5) },
+ { "er6", GDB_SIZEOF_REG, offsetof(struct pt_regs, er6) },
+ { "sp", GDB_SIZEOF_REG, offsetof(struct pt_regs, sp) },
+ { "ccr", GDB_SIZEOF_REG, offsetof(struct pt_regs, ccr) },
+ { "pc", GDB_SIZEOF_REG, offsetof(struct pt_regs, pc) },
+ { "cycles", GDB_SIZEOF_REG, -1 },
+#if defined(CONFIG_CPU_H8S)
+ { "exr", GDB_SIZEOF_REG, offsetof(struct pt_regs, exr) },
+#endif
+ { "tick", GDB_SIZEOF_REG, -1 },
+ { "inst", GDB_SIZEOF_REG, -1 },
+};
+
+char *dbg_get_reg(int regno, void *mem, struct pt_regs *regs)
+{
+ if (regno >= DBG_MAX_REG_NUM || regno < 0)
+ return NULL;
+
+ switch (regno) {
+ case GDB_CCR:
+#if defined(CONFIG_CPU_H8S)
+ case GDB_EXR:
+#endif
+ *(u32 *)mem = *(u16 *)((void *)regs +
+ dbg_reg_def[regno].offset);
+ break;
+ default:
+ if (dbg_reg_def[regno].offset >= 0)
+ memcpy(mem, (void *)regs + dbg_reg_def[regno].offset,
+ dbg_reg_def[regno].size);
+ else
+ memset(mem, 0, dbg_reg_def[regno].size);
+ break;
+ }
+ return dbg_reg_def[regno].name;
+}
+
+int dbg_set_reg(int regno, void *mem, struct pt_regs *regs)
+{
+ if (regno >= DBG_MAX_REG_NUM || regno < 0)
+ return -EINVAL;
+
+ switch (regno) {
+ case GDB_CCR:
+#if defined(CONFIG_CPU_H8S)
+ case GDB_EXR:
+#endif
+ *(u16 *)((void *)regs +
+ dbg_reg_def[regno].offset) = *(u32 *)mem;
+ break;
+ default:
+ memcpy((void *)regs + dbg_reg_def[regno].offset, mem,
+ dbg_reg_def[regno].size);
+ }
+ return 0;
+}
+
+asmlinkage void h8300_kgdb_trap(struct pt_regs *regs)
+{
+ regs->pc &= 0x00ffffff;
+ if (kgdb_handle_exception(10, SIGTRAP, 0, regs))
+ return;
+ if (*(u16 *)(regs->pc) == *(u16 *)&arch_kgdb_ops.gdb_bpt_instr)
+ regs->pc += BREAK_INSTR_SIZE;
+ regs->pc |= regs->ccr << 24;
+}
+
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
+{
+ memset((char *)gdb_regs, 0, NUMREGBYTES);
+ gdb_regs[GDB_SP] = p->thread.ksp;
+ gdb_regs[GDB_PC] = KSTK_EIP(p);
+}
+
+void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc)
+{
+ regs->pc = pc;
+}
+
+int kgdb_arch_handle_exception(int vector, int signo, int err_code,
+ char *remcom_in_buffer, char *remcom_out_buffer,
+ struct pt_regs *regs)
+{
+ char *ptr;
+ unsigned long addr;
+
+ switch (remcom_in_buffer[0]) {
+ case 's':
+ case 'c':
+ /* handle the optional parameters */
+ ptr = &remcom_in_buffer[1];
+ if (kgdb_hex2long(&ptr, &addr))
+ regs->pc = addr;
+
+ return 0;
+ }
+
+ return -1; /* this means that we do not want to exit from the handler */
+}
+
+int kgdb_arch_init(void)
+{
+ return 0;
+}
+
+void kgdb_arch_exit(void)
+{
+ /* Nothing to do */
+}
+
+const struct kgdb_arch arch_kgdb_ops = {
+ /* Breakpoint instruction: trapa #2 */
+ .gdb_bpt_instr = { 0x57, 0x20 },
+};
diff --git a/arch/h8300/kernel/setup.c b/arch/h8300/kernel/setup.c
index c772abe6d..e4985dfa9 100644
--- a/arch/h8300/kernel/setup.c
+++ b/arch/h8300/kernel/setup.c
@@ -207,14 +207,14 @@ device_initcall(device_probe);
#define get_wait(base, addr) ({ \
int baddr; \
baddr = ((addr) / 0x200000 * 2); \
- w *= (ctrl_inw((unsigned long)(base) + 2) & (3 << baddr)) + 1; \
+ w *= (readw((base) + 2) & (3 << baddr)) + 1; \
})
#endif
#if defined(CONFIG_CPU_H8S)
#define get_wait(base, addr) ({ \
int baddr; \
baddr = ((addr) / 0x200000 * 16); \
- w *= (ctrl_inl((unsigned long)(base) + 2) & (7 << baddr)) + 1; \
+ w *= (readl((base) + 2) & (7 << baddr)) + 1; \
})
#endif
@@ -228,8 +228,8 @@ static __init int access_timing(void)
bsc = of_find_compatible_node(NULL, NULL, "renesas,h8300-bsc");
base = of_iomap(bsc, 0);
- w = (ctrl_inb((unsigned long)base + 0) & bit)?2:1;
- if (ctrl_inb((unsigned long)base + 1) & bit)
+ w = (readb(base + 0) & bit)?2:1;
+ if (readb(base + 1) & bit)
w *= get_wait(base, addr);
else
w *= 2;
diff --git a/arch/h8300/kernel/signal.c b/arch/h8300/kernel/signal.c
index 380fffd08..ad1f81f57 100644
--- a/arch/h8300/kernel/signal.c
+++ b/arch/h8300/kernel/signal.c
@@ -95,7 +95,7 @@ restore_sigcontext(struct sigcontext *usc, int *pd0)
regs->ccr |= ccr;
regs->orig_er0 = -1; /* disable syscall checks */
err |= __get_user(usp, &usc->sc_usp);
- wrusp(usp);
+ regs->sp = usp;
err |= __get_user(er0, &usc->sc_er0);
*pd0 = er0;
@@ -180,7 +180,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
return -EFAULT;
/* Set up to return from userspace. */
- ret = frame->retcode;
+ ret = (unsigned char *)&frame->retcode;
if (ksig->ka.sa.sa_flags & SA_RESTORER)
ret = (unsigned char *)(ksig->ka.sa.sa_restorer);
else {
@@ -196,8 +196,8 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
return -EFAULT;
/* Set up registers for signal handler */
- wrusp((unsigned long) frame);
- regs->pc = (unsigned long) ksig->ka.sa.sa_handler;
+ regs->sp = (unsigned long)frame;
+ regs->pc = (unsigned long)ksig->ka.sa.sa_handler;
regs->er0 = ksig->sig;
regs->er1 = (unsigned long)&(frame->info);
regs->er2 = (unsigned long)&frame->uc;
diff --git a/arch/h8300/kernel/traps.c b/arch/h8300/kernel/traps.c
index 1b2d7cdd6..044a36125 100644
--- a/arch/h8300/kernel/traps.c
+++ b/arch/h8300/kernel/traps.c
@@ -125,17 +125,18 @@ void show_stack(struct task_struct *task, unsigned long *esp)
pr_info("Stack from %08lx:", (unsigned long)stack);
for (i = 0; i < kstack_depth_to_print; i++) {
- if (((unsigned long)stack & (THREAD_SIZE - 1)) == 0)
+ if (((unsigned long)stack & (THREAD_SIZE - 1)) >=
+ THREAD_SIZE-4)
break;
if (i % 8 == 0)
- pr_info("\n ");
- pr_info(" %08lx", *stack++);
+ pr_info(" ");
+ pr_cont(" %08lx", *stack++);
}
- pr_info("\nCall Trace:");
+ pr_info("\nCall Trace:\n");
i = 0;
stack = esp;
- while (((unsigned long)stack & (THREAD_SIZE - 1)) != 0) {
+ while (((unsigned long)stack & (THREAD_SIZE - 1)) < THREAD_SIZE-4) {
addr = *stack++;
/*
* If the address is either in the text segment of the
@@ -147,15 +148,10 @@ void show_stack(struct task_struct *task, unsigned long *esp)
*/
if (check_kernel_text(addr)) {
if (i % 4 == 0)
- pr_info("\n ");
- pr_info(" [<%08lx>]", addr);
+ pr_info(" ");
+ pr_cont(" [<%08lx>]", addr);
i++;
}
}
pr_info("\n");
}
-
-void show_trace_task(struct task_struct *tsk)
-{
- show_stack(tsk, (unsigned long *)tsk->thread.esp0);
-}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-17 12:17:14 +0000