diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2023-06-06 16:24:46 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-06-15 07:03:55 +0300 |
| commit | afc6386815a88d067d9f567dcc6266800286f626 (patch) | |
| tree | dff37d6419b4bc2dc70bb2ad3ce04742ca9500e8 /arch/powerpc/include | |
| parent | 6958ad05d5789a303afe4fa4495df43993d9b7cb (diff) | |
| download | linux-afc6386815a88d067d9f567dcc6266800286f626.tar.xz | |
powerpc: merge 32-bit and 64-bit _switch implementation
The _switch stack frame setup are substantially the same, so are the
comments. The difference in how the stack and current are switched,
and other hardware and software housekeeping is done is moved into
macros.
Generated code should be unchanged.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Tweak include orer to fix compile errors on some configs]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230606132447.315714-6-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/ppc_asm.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h index 5f05a984b103..e7792aa13510 100644 --- a/arch/powerpc/include/asm/ppc_asm.h +++ b/arch/powerpc/include/asm/ppc_asm.h @@ -406,6 +406,15 @@ n: /* offsets for stack frame layout */ #define LRSAVE 16 +/* + * GCC stack frames follow a different pattern on 32 vs 64. This can be used + * to make asm frames be consistent with C. + */ +#define PPC_CREATE_STACK_FRAME(size) \ + mflr r0; \ + std r0,16(r1); \ + stdu r1,-(size)(r1) + #else /* 32-bit */ #define LOAD_REG_IMMEDIATE(reg, expr) __LOAD_REG_IMMEDIATE_32 reg, expr @@ -422,6 +431,11 @@ n: /* offsets for stack frame layout */ #define LRSAVE 4 +#define PPC_CREATE_STACK_FRAME(size) \ + stwu r1,-(size)(r1); \ + mflr r0; \ + stw r0,(size+4)(r1) + #endif /* various errata or part fixups */ |