diff options
Diffstat (limited to 'arch/powerpc/kernel/head_64.S')
| -rw-r--r-- | arch/powerpc/kernel/head_64.S | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index 3564c49c683..06c7251c1bf 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -51,6 +51,11 @@ * For pSeries or server processors: * 1. The MMU is off & open firmware is running in real mode. * 2. The kernel is entered at __start + * -or- For OPAL entry: + * 1. The MMU is off, processor in HV mode, primary CPU enters at 0 + * with device-tree in gpr3. We also get OPAL base in r8 and + * entry in r9 for debugging purposes + * 2. Secondary processors enter at 0x60 with PIR in gpr3 * * For iSeries: * 1. The MMU is on (as it always is for iSeries) @@ -331,6 +336,11 @@ _GLOBAL(__start_initialization_multiplatform) /* Save parameters */ mr r31,r3 mr r30,r4 +#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL + /* Save OPAL entry */ + mr r28,r8 + mr r29,r9 +#endif #ifdef CONFIG_PPC_BOOK3E bl .start_initialization_book3e @@ -674,9 +684,9 @@ _GLOBAL(enable_64b_mode) _GLOBAL(relative_toc) mflr r0 bcl 20,31,$+4 -0: mflr r9 - ld r2,(p_toc - 0b)(r9) - add r2,r2,r9 +0: mflr r11 + ld r2,(p_toc - 0b)(r11) + add r2,r2,r11 mtlr r0 blr @@ -707,6 +717,12 @@ _INIT_STATIC(start_here_multiplatform) bdnz 3b 4: +#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL + /* Setup OPAL entry */ + std r28,0(r11); + std r29,8(r11); +#endif + #ifndef CONFIG_PPC_BOOK3E mfmsr r6 ori r6,r6,MSR_RI |