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| author | Tiejun Chen <tiejun.chen@windriver.com> | 2015-10-06 22:48:15 -0500 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-10-27 18:13:27 -0500 |
| commit | 1cb6e064924857e600d13b4f6be5511145ecb560 (patch) | |
| tree | 95c33bcfee818811a94def404737f5bfeeb9bd38 /arch/powerpc/kernel/head_64.S | |
| parent | 835c031c98ee1d166c7fdcdbd8c9cc20e05286d4 (diff) | |
| download | op-kernel-dev-1cb6e064924857e600d13b4f6be5511145ecb560.zip op-kernel-dev-1cb6e064924857e600d13b4f6be5511145ecb560.tar.gz | |
powerpc/book3e: support CONFIG_RELOCATABLE
book3e is different with book3s since 3s includes the exception
vectors code in head_64.S as it relies on absolute addressing
which is only possible within this compilation unit. So we have
to get that label address with got.
And when boot a relocated kernel, we should reset ipvr properly again
after .relocate.
Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
[scottwood: cleanup and ifdef removal]
Signed-off-by: Scott Wood <scottwood@freescale.com>
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 a1e85ca..1b77956 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -457,12 +457,22 @@ __after_prom_start: /* process relocations for the final address of the kernel */ lis r25,PAGE_OFFSET@highest /* compute virtual base of kernel */ sldi r25,r25,32 +#if defined(CONFIG_PPC_BOOK3E) + tovirt(r26,r26) /* on booke, we already run at PAGE_OFFSET */ +#endif lwz r7,__run_at_load-_stext(r26) +#if defined(CONFIG_PPC_BOOK3E) + tophys(r26,r26) +#endif cmplwi cr0,r7,1 /* flagged to stay where we are ? */ bne 1f add r25,r25,r26 1: mr r3,r25 bl relocate +#if defined(CONFIG_PPC_BOOK3E) + /* IVPR needs to be set after relocation. */ + bl init_core_book3e +#endif #endif /* @@ -490,12 +500,21 @@ __after_prom_start: * variable __run_at_load, if it is set the kernel is treated as relocatable * kernel, otherwise it will be moved to PHYSICAL_START */ +#if defined(CONFIG_PPC_BOOK3E) + tovirt(r26,r26) /* on booke, we already run at PAGE_OFFSET */ +#endif lwz r7,__run_at_load-_stext(r26) cmplwi cr0,r7,1 bne 3f +#ifdef CONFIG_PPC_BOOK3E + LOAD_REG_ADDR(r5, __end_interrupts) + LOAD_REG_ADDR(r11, _stext) + sub r5,r5,r11 +#else /* just copy interrupts */ LOAD_REG_IMMEDIATE(r5, __end_interrupts - _stext) +#endif b 5f 3: #endif @@ -514,9 +533,6 @@ __after_prom_start: p_end: .llong _end - _stext 4: /* Now copy the rest of the kernel up to _end */ -#if defined(CONFIG_PPC_BOOK3E) - tovirt(r26,r26) -#endif addis r5,r26,(p_end - _stext)@ha ld r5,(p_end - _stext)@l(r5) /* get _end */ 5: bl copy_and_flush /* copy the rest */ |
