diff options
Diffstat (limited to 'arch/arm/kernel/head.S')
| -rw-r--r-- | arch/arm/kernel/head.S | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S index c9173cfbbc74..278c1b0ebb2e 100644 --- a/arch/arm/kernel/head.S +++ b/arch/arm/kernel/head.S @@ -59,7 +59,7 @@ * * This is normally called from the decompressor code. The requirements * are: MMU = off, D-cache = off, I-cache = dont care, r0 = 0, - * r1 = machine nr, r2 = atags pointer. + * r1 = machine nr, r2 = atags or dtb pointer. * * This code is mostly position independent, so if you link the kernel at * 0xc0008000, you call this at __pa(0xc0008000). @@ -91,7 +91,7 @@ ENTRY(stext) #endif /* - * r1 = machine no, r2 = atags, + * r1 = machine no, r2 = atags or dtb, * r8 = phys_offset, r9 = cpuid, r10 = procinfo */ bl __vet_atags @@ -113,6 +113,7 @@ ENTRY(stext) ldr r13, =__mmap_switched @ address to jump to after @ mmu has been enabled adr lr, BSYM(1f) @ return (PIC) address + mov r8, r4 @ set TTBR1 to swapper_pg_dir ARM( add pc, r10, #PROCINFO_INITFUNC ) THUMB( add r12, r10, #PROCINFO_INITFUNC ) THUMB( mov pc, r12 ) @@ -302,8 +303,10 @@ ENTRY(secondary_startup) */ adr r4, __secondary_data ldmia r4, {r5, r7, r12} @ address to jump to after - sub r4, r4, r5 @ mmu has been enabled - ldr r4, [r7, r4] @ get secondary_data.pgdir + sub lr, r4, r5 @ mmu has been enabled + ldr r4, [r7, lr] @ get secondary_data.pgdir + add r7, r7, #4 + ldr r8, [r7, lr] @ get secondary_data.swapper_pg_dir adr lr, BSYM(__enable_mmu) @ return address mov r13, r12 @ __secondary_switched address ARM( add pc, r10, #PROCINFO_INITFUNC ) @ initialise processor @@ -339,7 +342,7 @@ __secondary_data: * * r0 = cp#15 control register * r1 = machine ID - * r2 = atags pointer + * r2 = atags or dtb pointer * r4 = page table pointer * r9 = processor ID * r13 = *virtual* address to jump to upon completion @@ -376,7 +379,7 @@ ENDPROC(__enable_mmu) * * r0 = cp#15 control register * r1 = machine ID - * r2 = atags pointer + * r2 = atags or dtb pointer * r9 = processor ID * r13 = *virtual* address to jump to upon completion * |