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| author | Nicholas Piggin <npiggin@gmail.com> | 2023-04-08 05:17:47 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-04-20 05:23:14 +0300 |
| commit | 4f18b9e6ca58440394e86a53bf1be0d8a1920bcd (patch) | |
| tree | 1f06eacba90d74f6513fd9a65d0323244738ed51 | |
| parent | 40f7b523e31fd68163d9dfe639f2f34b6a726ecd (diff) | |
| download | linux-4f18b9e6ca58440394e86a53bf1be0d8a1920bcd.tar.xz | |
powerpc/64: Move initial base and TOC pointer calculation
A later change moves the non-prom case to run at the virtual address
earlier, which calls for virtual TOC and kernel base. Split these two
calculations for prom and non-prom to make that change simpler.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Retain relative_toc call for start_initialization_book3e]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230408021752.862660-2-npiggin@gmail.com
| -rw-r--r-- | arch/powerpc/kernel/head_64.S | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index 1febb56ebaeb..00ac5920e84b 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -515,15 +515,6 @@ __start_initialization_multiplatform: /* Zero r13 (paca) so early program check / mce don't use it */ li r13,0 - /* Get TOC pointer (current runtime address) */ - bl relative_toc - - /* find out where we are now */ - bcl 20,31,$+4 -0: mflr r26 /* r26 = runtime addr here */ - addis r26,r26,(_stext - 0b)@ha - addi r26,r26,(_stext - 0b)@l /* current runtime base addr */ - /* * Are we booted from a PROM Of-type client-interface ? */ @@ -540,16 +531,38 @@ __start_initialization_multiplatform: mr r29,r9 #endif + /* Get TOC pointer (current runtime address) */ + bl relative_toc + #ifdef CONFIG_PPC_BOOK3E_64 bl start_initialization_book3e #else bl start_initialization_book3s #endif /* CONFIG_PPC_BOOK3E_64 */ + + /* Get TOC pointer */ + bl relative_toc + + /* find out where we are now */ + bcl 20,31,$+4 +0: mflr r26 /* r26 = runtime addr here */ + addis r26,r26,(_stext - 0b)@ha + addi r26,r26,(_stext - 0b)@l /* current runtime base addr */ + b __after_prom_start __REF __boot_from_prom: #ifdef CONFIG_PPC_OF_BOOT_TRAMPOLINE + /* Get TOC pointer */ + bl relative_toc + + /* find out where we are now */ + bcl 20,31,$+4 +0: mflr r26 /* r26 = runtime addr here */ + addis r26,r26,(_stext - 0b)@ha + addi r26,r26,(_stext - 0b)@l /* current runtime base addr */ + /* Save parameters */ mr r31,r3 mr r30,r4 |