aboutsummaryrefslogtreecommitdiff
path: root/lib_ppc/kgdb.c
diff options
context:
space:
mode:
authorPeter Tyser <ptyser@xes-inc.com>2010-04-12 22:28:04 -0500
committerWolfgang Denk <wd@denx.de>2010-04-13 09:13:03 +0200
commitea0364f1bbfed1e3ea711147420875cf338fe77a (patch)
tree15c051bc4d2e94c1661c73e1b87c22c7beda7c24 /lib_ppc/kgdb.c
parent89f39e177e7b0152aa1d3152baa25d986e36cdcf (diff)
downloadu-boot-ea0364f1bbfed1e3ea711147420875cf338fe77a.zip
u-boot-ea0364f1bbfed1e3ea711147420875cf338fe77a.tar.gz
u-boot-ea0364f1bbfed1e3ea711147420875cf338fe77a.tar.bz2
Move lib_$ARCH directories to arch/$ARCH/lib
Also move lib_$ARCH/config.mk to arch/$ARCH/config.mk This change is intended to clean up the top-level directory structure and more closely mimic Linux's directory organization. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'lib_ppc/kgdb.c')
-rw-r--r--lib_ppc/kgdb.c321
1 files changed, 0 insertions, 321 deletions
diff --git a/lib_ppc/kgdb.c b/lib_ppc/kgdb.c
deleted file mode 100644
index d3eb1f3..0000000
--- a/lib_ppc/kgdb.c
+++ /dev/null
@@ -1,321 +0,0 @@
-#include <common.h>
-#include <command.h>
-#include <kgdb.h>
-#include <asm/signal.h>
-#include <asm/processor.h>
-
-#define PC_REGNUM 64
-#define SP_REGNUM 1
-
-void breakinst(void);
-
-int
-kgdb_setjmp(long *buf)
-{
- asm ("mflr 0; stw 0,0(%0);"
- "stw 1,4(%0); stw 2,8(%0);"
- "mfcr 0; stw 0,12(%0);"
- "stmw 13,16(%0)"
- : : "r" (buf));
- /* XXX should save fp regs as well */
- return 0;
-}
-
-void
-kgdb_longjmp(long *buf, int val)
-{
- if (val == 0)
- val = 1;
- asm ("lmw 13,16(%0);"
- "lwz 0,12(%0); mtcrf 0x38,0;"
- "lwz 0,0(%0); lwz 1,4(%0); lwz 2,8(%0);"
- "mtlr 0; mr 3,%1"
- : : "r" (buf), "r" (val));
-}
-
-static inline unsigned long
-get_msr(void)
-{
- unsigned long msr;
- asm volatile("mfmsr %0" : "=r" (msr):);
- return msr;
-}
-
-static inline void
-set_msr(unsigned long msr)
-{
- asm volatile("mtmsr %0" : : "r" (msr));
-}
-
-/* Convert the SPARC hardware trap type code to a unix signal number. */
-/*
- * This table contains the mapping between PowerPC hardware trap types, and
- * signals, which are primarily what GDB understands.
- */
-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 */
- { 0, 0} /* Must be last */
-};
-
-static int
-computeSignal(unsigned int tt)
-{
- struct hard_trap_info *ht;
-
- for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
- if (ht->tt == tt)
- return ht->signo;
-
- return SIGHUP; /* default for things we don't know about */
-}
-
-void
-kgdb_enter(struct pt_regs *regs, kgdb_data *kdp)
-{
- unsigned long msr;
-
- kdp->private[0] = msr = get_msr();
- set_msr(msr & ~MSR_EE); /* disable interrupts */
-
- if (regs->nip == (unsigned long)breakinst) {
- /* Skip over breakpoint trap insn */
- regs->nip += 4;
- }
- regs->msr &= ~MSR_SE;
-
- /* reply to host that an exception has occurred */
- kdp->sigval = computeSignal(regs->trap);
-
- kdp->nregs = 2;
-
- kdp->regs[0].num = PC_REGNUM;
- kdp->regs[0].val = regs->nip;
-
- kdp->regs[1].num = SP_REGNUM;
- kdp->regs[1].val = regs->gpr[SP_REGNUM];
-}
-
-void
-kgdb_exit(struct pt_regs *regs, kgdb_data *kdp)
-{
- unsigned long msr = kdp->private[0];
-
- if (kdp->extype & KGDBEXIT_WITHADDR)
- regs->nip = kdp->exaddr;
-
- switch (kdp->extype & KGDBEXIT_TYPEMASK) {
-
- case KGDBEXIT_KILL:
- case KGDBEXIT_CONTINUE:
- set_msr(msr);
- break;
-
- case KGDBEXIT_SINGLE:
- regs->msr |= MSR_SE;
-#if 0
- set_msr(msr | MSR_SE);
-#endif
- break;
- }
-}
-
-int
-kgdb_trap(struct pt_regs *regs)
-{
- return (regs->trap);
-}
-
-/* return the value of the CPU registers.
- * some of them are non-PowerPC names :(
- * they are stored in gdb like:
- * struct {
- * u32 gpr[32];
- * f64 fpr[32];
- * u32 pc, ps, cnd, lr; (ps=msr)
- * u32 cnt, xer, mq;
- * }
- */
-
-#define SPACE_REQUIRED ((32*4)+(32*8)+(6*4))
-
-#ifdef CONFIG_8260
-/* store floating double indexed */
-#define STFDI(n,p) __asm__ __volatile__ ("stfd " #n ",%0" : "=o"(p[2*n]))
-/* store floating double multiple */
-#define STFDM(p) { STFDI( 0,p); STFDI( 1,p); STFDI( 2,p); STFDI( 3,p); \
- STFDI( 4,p); STFDI( 5,p); STFDI( 6,p); STFDI( 7,p); \
- STFDI( 8,p); STFDI( 9,p); STFDI(10,p); STFDI(11,p); \
- STFDI(12,p); STFDI(13,p); STFDI(14,p); STFDI(15,p); \
- STFDI(16,p); STFDI(17,p); STFDI(18,p); STFDI(19,p); \
- STFDI(20,p); STFDI(21,p); STFDI(22,p); STFDI(23,p); \
- STFDI(24,p); STFDI(25,p); STFDI(26,p); STFDI(27,p); \
- STFDI(28,p); STFDI(29,p); STFDI(30,p); STFDI(31,p); }
-#endif
-
-int
-kgdb_getregs(struct pt_regs *regs, char *buf, int max)
-{
- int i;
- unsigned long *ptr = (unsigned long *)buf;
-
- if (max < SPACE_REQUIRED)
- kgdb_error(KGDBERR_NOSPACE);
-
- if ((unsigned long)ptr & 3)
- kgdb_error(KGDBERR_ALIGNFAULT);
-
- /* General Purpose Regs */
- for (i = 0; i < 32; i++)
- *ptr++ = regs->gpr[i];
-
- /* Floating Point Regs */
-#ifdef CONFIG_8260
- STFDM(ptr);
- ptr += 32*2;
-#else
- for (i = 0; i < 32; i++) {
- *ptr++ = 0;
- *ptr++ = 0;
- }
-#endif
-
- /* pc, msr, cr, lr, ctr, xer, (mq is unused) */
- *ptr++ = regs->nip;
- *ptr++ = regs->msr;
- *ptr++ = regs->ccr;
- *ptr++ = regs->link;
- *ptr++ = regs->ctr;
- *ptr++ = regs->xer;
-
- return (SPACE_REQUIRED);
-}
-
-/* set the value of the CPU registers */
-
-#ifdef CONFIG_8260
-/* load floating double */
-#define LFD(n,v) __asm__ __volatile__ ("lfd " #n ",%0" :: "o"(v))
-/* load floating double indexed */
-#define LFDI(n,p) __asm__ __volatile__ ("lfd " #n ",%0" :: "o"((p)[2*n]))
-/* load floating double multiple */
-#define LFDM(p) { LFDI( 0,p); LFDI( 1,p); LFDI( 2,p); LFDI( 3,p); \
- LFDI( 4,p); LFDI( 5,p); LFDI( 6,p); LFDI( 7,p); \
- LFDI( 8,p); LFDI( 9,p); LFDI(10,p); LFDI(11,p); \
- LFDI(12,p); LFDI(13,p); LFDI(14,p); LFDI(15,p); \
- LFDI(16,p); LFDI(17,p); LFDI(18,p); LFDI(19,p); \
- LFDI(20,p); LFDI(21,p); LFDI(22,p); LFDI(23,p); \
- LFDI(24,p); LFDI(25,p); LFDI(26,p); LFDI(27,p); \
- LFDI(28,p); LFDI(29,p); LFDI(30,p); LFDI(31,p); }
-#endif
-
-void
-kgdb_putreg(struct pt_regs *regs, int regno, char *buf, int length)
-{
- unsigned long *ptr = (unsigned long *)buf;
-
- if (regno < 0 || regno >= 70)
- kgdb_error(KGDBERR_BADPARAMS);
- else if (regno >= 32 && regno < 64) {
- if (length < 8)
- kgdb_error(KGDBERR_NOSPACE);
- }
- else {
- if (length < 4)
- kgdb_error(KGDBERR_NOSPACE);
- }
-
- if ((unsigned long)ptr & 3)
- kgdb_error(KGDBERR_ALIGNFAULT);
-
- if (regno >= 0 && regno < 32)
- regs->gpr[regno] = *ptr;
- else switch (regno) {
-
-#ifdef CONFIG_8260
-#define caseF(n) \
- case (n) + 32: LFD(n, *ptr); break;
-
-caseF( 0) caseF( 1) caseF( 2) caseF( 3) caseF( 4) caseF( 5) caseF( 6) caseF( 7)
-caseF( 8) caseF( 9) caseF(10) caseF(11) caseF(12) caseF(13) caseF(14) caseF(15)
-caseF(16) caseF(17) caseF(18) caseF(19) caseF(20) caseF(21) caseF(22) caseF(23)
-caseF(24) caseF(25) caseF(26) caseF(27) caseF(28) caseF(29) caseF(30) caseF(31)
-
-#undef caseF
-#endif
-
- case 64: regs->nip = *ptr; break;
- case 65: regs->msr = *ptr; break;
- case 66: regs->ccr = *ptr; break;
- case 67: regs->link = *ptr; break;
- case 68: regs->ctr = *ptr; break;
- case 69: regs->ctr = *ptr; break;
-
- default:
- kgdb_error(KGDBERR_BADPARAMS);
- }
-}
-
-void
-kgdb_putregs(struct pt_regs *regs, char *buf, int length)
-{
- int i;
- unsigned long *ptr = (unsigned long *)buf;
-
- if (length < SPACE_REQUIRED)
- kgdb_error(KGDBERR_NOSPACE);
-
- if ((unsigned long)ptr & 3)
- kgdb_error(KGDBERR_ALIGNFAULT);
-
- /*
- * If the stack pointer has moved, you should pray.
- * (cause only god can help you).
- */
-
- /* General Purpose Regs */
- for (i = 0; i < 32; i++)
- regs->gpr[i] = *ptr++;
-
- /* Floating Point Regs */
-#ifdef CONFIG_8260
- LFDM(ptr);
-#endif
- ptr += 32*2;
-
- /* pc, msr, cr, lr, ctr, xer, (mq is unused) */
- regs->nip = *ptr++;
- regs->msr = *ptr++;
- regs->ccr = *ptr++;
- regs->link = *ptr++;
- regs->ctr = *ptr++;
- regs->xer = *ptr++;
-}
-
-/* This function will generate a breakpoint exception. It is used at the
- beginning of a program to sync up with a debugger and can be used
- otherwise as a quick means to stop program execution and "break" into
- the debugger. */
-
-void
-kgdb_breakpoint(int argc, char *argv[])
-{
- asm(" .globl breakinst\n\
- breakinst: .long 0x7d821008\n\
- ");
-}