[U-Boot-Users] [PATCH] MPC85xx KGDB support
Chen Gong-B11801
G.Chen at freescale.com
Fri Nov 2 04:13:04 CET 2007
I'm sorry to forget to add some description.
I want to add kgdb support for MPC85xx platform. With this patch, gdb can connect the board,
but it seems there are some problems,such as setting breakpoint has no respond. I test it
using MPC8548CDS board, because it has only one serial port, so maybe this is the one of the reasons.
Anyone can help me to test it on the other board? If you want to do that, you need change the
config file(in the include/configs/xxx.h) like I do. Any respond is welcome!
> -----Original Message-----
> From: Chen Gong-B11801
> Sent: 2007年11月2日 11:16
> To: u-boot-users at lists.sourceforge.net
> Cc: Loeliger Jon-LOELIGER; Chen Gong-B11801
> Subject: [PATCH] MPC85xx KGDB support
>
> ---
> cpu/mpc85xx/Makefile | 4 +-
> drivers/serial.c | 28 +++++++++++++++++++
> include/configs/MPC8548CDS.h | 3 +-
> lib_ppc/kgdb.c | 62
> +++++++++++++++++++++++++++++++++---------
> 4 files changed, 81 insertions(+), 16 deletions(-)
>
> diff --git a/cpu/mpc85xx/Makefile b/cpu/mpc85xx/Makefile
> index 32091fa..f5cb148 100644
> --- a/cpu/mpc85xx/Makefile
> +++ b/cpu/mpc85xx/Makefile
> @@ -28,7 +28,7 @@ include $(TOPDIR)/config.mk
>
> LIB = $(obj)lib$(CPU).a
>
> -START = start.o resetvec.o
> +START = start.o resetvec.o kgdb.o
> COBJS = traps.o cpu.o cpu_init.o speed.o interrupts.o \
> pci.o serial_scc.o commproc.o ether_fcc.o spd_sdram.o qe_io.o
>
> @@ -39,7 +39,7 @@ START := $(addprefix $(obj),$(START))
> all: $(obj).depend $(START) $(LIB)
>
> $(LIB): $(OBJS)
> - $(AR) $(ARFLAGS) $@ $(OBJS)
> + $(AR) $(ARFLAGS) $@ $(OBJS) $(obj)kgdb.o
>
>
> ##############################################################
> ###########
>
> diff --git a/drivers/serial.c b/drivers/serial.c index
> 76425d8..42585d7 100644
> --- a/drivers/serial.c
> +++ b/drivers/serial.c
> @@ -307,6 +307,34 @@ serial_setbrg(void) } #endif
>
> +#if defined(CONFIG_CMD_KGDB)
> +void kgdb_serial_init (void)
> +{
> + /* here presume you have been initialzed appropriate COM# */
> + _serial_puts("[on serial] ",CONFIG_KGDB_SER_INDEX); }
> +
> +void putDebugChar (int c)
> +{
> + _serial_putc(c, CONFIG_KGDB_SER_INDEX); }
> +
> +void putDebugStr (const char *str)
> +{
> + _serial_puts(str, CONFIG_KGDB_SER_INDEX); }
> +
> +int getDebugChar (void)
> +{
> + return _serial_getc(CONFIG_KGDB_SER_INDEX);
> +}
> +
> +void kgdb_interruptible (int yes)
> +{
> + return;
> +}
> +#endif
> +
> #if defined(CONFIG_SERIAL_MULTI)
>
> DECLARE_ESERIAL_FUNCTIONS(1);
> diff --git a/include/configs/MPC8548CDS.h
> b/include/configs/MPC8548CDS.h index 6083715..396feeb 100644
> --- a/include/configs/MPC8548CDS.h
> +++ b/include/configs/MPC8548CDS.h
> @@ -482,6 +482,7 @@ extern unsigned long
> get_clock_freq(void); #define CONFIG_CMD_PING #define
> CONFIG_CMD_I2C #define CONFIG_CMD_MII
> +#define CONFIG_CMD_KGDB
>
> #if defined(CONFIG_PCI)
> #define CONFIG_CMD_PCI
> @@ -529,7 +530,7 @@ extern unsigned long get_clock_freq(void);
> #define BOOTFLAG_WARM 0x02 /* Software reboot */
>
> #if defined(CONFIG_CMD_KGDB)
> -#define CONFIG_KGDB_BAUDRATE 230400 /* speed to run kgdb
> serial port */
> +#define CONFIG_KGDB_BAUDRATE 115200 /* speed to run kgdb
> serial port */
> #define CONFIG_KGDB_SER_INDEX 2 /* which serial
> port to use */
> #endif
>
> diff --git a/lib_ppc/kgdb.c b/lib_ppc/kgdb.c index
> 78c2f0c..7acdebc 100644
> --- a/lib_ppc/kgdb.c
> +++ b/lib_ppc/kgdb.c
> @@ -60,20 +60,46 @@ static struct hard_trap_info
> unsigned int tt; /* Trap type code for powerpc */
> unsigned char signo; /* Signal that we map
> this trap into */
> } hard_trap_info[] = {
> - { 0x200, SIGSEGV }, /* machine check */
> - { 0x300, SIGSEGV }, /* address
> error (store) */
> - { 0x400, SIGBUS }, /* instruction
> bus error */
> - { 0x500, SIGINT }, /* interrupt */
> - { 0x600, SIGBUS }, /* alingment */
> - { 0x700, SIGTRAP }, /* breakpoint trap */
> - { 0x800, SIGFPE }, /* fpu unavail */
> - { 0x900, SIGALRM }, /* decrementer */
> - { 0xa00, SIGILL }, /* reserved */
> - { 0xb00, SIGILL }, /* reserved */
> - { 0xc00, SIGCHLD }, /* syscall */
> - { 0xd00, SIGTRAP }, /* single-step/watch */
> - { 0xe00, SIGFPE }, /* fp assist */
> +#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
> + { 0x100, SIGINT }, /* critical input interrupt */
> + { 0x200, SIGSEGV }, /* machine check */
> + { 0x300, SIGSEGV }, /* data storage */
> + { 0x400, SIGBUS }, /* instruction storage */
> + { 0x500, SIGINT }, /* interrupt */
> + { 0x600, SIGBUS }, /* alignment */
> + { 0x700, SIGILL }, /* program */
> + { 0x800, SIGILL }, /* reserved */
> + { 0x900, SIGILL }, /* reserved */
> + { 0xa00, SIGILL }, /* reserved */
> + { 0xb00, SIGILL }, /* reserved */
> + { 0xc00, SIGCHLD }, /* syscall */
> + { 0xd00, SIGILL }, /* reserved */
> + { 0xe00, SIGILL }, /* reserved */
> + { 0xf00, SIGILL }, /* reserved */
> + /*
> + * 0x1000 PIT
> + * 0x1010 FIT
> + * 0x1020 watchdog
> + * 0x1100 data TLB miss
> + * 0x1200 instruction TLB miss
> + */
> + { 0x2002, SIGTRAP}, /* debug */
> +#else
> + { 0x200, SIGSEGV }, /* machine check */
> + { 0x300, SIGSEGV }, /* address error (store) */
> + { 0x400, SIGBUS }, /* instruction bus error */
> + { 0x500, SIGINT }, /* interrupt */
> + { 0x600, SIGBUS }, /* alingment */
> + { 0x700, SIGTRAP }, /* breakpoint trap */
> + { 0x800, SIGFPE }, /* fpu unavail */
> + { 0x900, SIGALRM }, /* decrementer */
> + { 0xa00, SIGILL }, /* reserved */
> + { 0xb00, SIGILL }, /* reserved */
> + { 0xc00, SIGCHLD }, /* syscall */
> + { 0xd00, SIGTRAP }, /* single-step/watch */
> + { 0xe00, SIGFPE }, /* fp assist */
> { 0, 0} /* Must be last */
> +#endif
> };
>
> static int
> @@ -100,7 +126,12 @@ kgdb_enter(struct pt_regs *regs, kgdb_data *kdp)
> /* Skip over breakpoint trap insn */
> regs->nip += 4;
> }
> +#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
> + mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) & ~DBCR_IC);
> + regs->msr &= ~MSR_DE;
> +#else
> regs->msr &= ~MSR_SE;
> +#endif
>
> /* reply to host that an exception has occurred */
> kdp->sigval = computeSignal(regs->trap); @@ -130,7
> +161,12 @@ kgdb_exit(struct pt_regs *regs, kgdb_data *kdp)
> break;
>
> case KGDBEXIT_SINGLE:
> +#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
> + mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR_IC);
> + regs->msr |= MSR_DE;
> +#else
> regs->msr |= MSR_SE;
> +#endif
> #if 0
> set_msr(msr | MSR_SE);
> #endif
> --
> 1.5.2
>
>
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