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| author | David S. Miller <davem@davemloft.net> | 2008-04-29 13:38:50 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-04-29 13:38:50 +0400 |
| commit | e2fdd7fd99dd68b77caaf2a2272b75b5da890de7 (patch) | |
| tree | d2b6d3a9b50e4d2ced793430d2b1414f790666a3 /arch/sparc64/mm/ultra.S | |
| parent | 4d7ffa49909a830f5f926a3280731d01e29f31fb (diff) | |
| download | linux-e2fdd7fd99dd68b77caaf2a2272b75b5da890de7.tar.xz | |
sparc: Add kgdb support.
Current limitations:
1) On SMP single stepping has some fundamental issues,
shared with other sw single-step architectures such
as mips and arm.
2) On 32-bit sparc we don't support SMP kgdb yet. That
requires some reworking of the IPI mechanisms and
infrastructure on that platform.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/mm/ultra.S')
| -rw-r--r-- | arch/sparc64/mm/ultra.S | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/sparc64/mm/ultra.S b/arch/sparc64/mm/ultra.S index e686a67561af..796e005dad8b 100644 --- a/arch/sparc64/mm/ultra.S +++ b/arch/sparc64/mm/ultra.S @@ -676,6 +676,33 @@ xcall_new_mmu_context_version: wr %g0, (1 << PIL_SMP_CTX_NEW_VERSION), %set_softint retry +#ifdef CONFIG_KGDB + .globl xcall_kgdb_capture +xcall_kgdb_capture: +661: rdpr %pstate, %g2 + wrpr %g2, PSTATE_IG | PSTATE_AG, %pstate + .section .sun4v_2insn_patch, "ax" + .word 661b + nop + nop + .previous + + rdpr %pil, %g2 + wrpr %g0, 15, %pil + sethi %hi(109f), %g7 + ba,pt %xcc, etrap_irq +109: or %g7, %lo(109b), %g7 +#ifdef CONFIG_TRACE_IRQFLAGS + call trace_hardirqs_off + nop +#endif + call smp_kgdb_capture_client + add %sp, PTREGS_OFF, %o0 + /* Has to be a non-v9 branch due to the large distance. */ + ba rtrap_xcall + ldx [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1 +#endif + #endif /* CONFIG_SMP */ |