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| author | Michael Schmitz <schmitzmic@gmail.com> | 2014-03-31 12:06:05 +0400 |
|---|---|---|
| committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2014-05-27 00:41:24 +0400 |
| commit | fded332bf40349788c83399751fd3764fddc4b51 (patch) | |
| tree | cfcfdf84e1a20ee40a135f63664160f36eb2f053 /arch/m68k/include | |
| parent | c7208164e66f63e3ec1759b98087849286410741 (diff) | |
| download | linux-fded332bf40349788c83399751fd3764fddc4b51.tar.xz | |
m68k/atari - stram: alloc ST-RAM pool even if kernel not in ST-RAM
With the kernel loaded to FastRAM (TT-RAM), none of the ST-RAM
address range is mapped by init_mem, and ST-RAM is not accessible
through the normal allocation pathways as a result.
Implement ST-RAM pool allocation to be based on physical addresses
always (it already was when the kernel was loaded in ST-RAM).
Return kernel virtual addresses as per normal.
The current test for the kernel residing in ST-RAM always returns
true. Use the bootinfo memory chunk order instead - with the kernel
in FastRAM, ST-RAM (phys. 0x0) is not the first chunk.
In case the kernel is running from FastRAM, delay mapping of ST-RAM
pool until after mem_init.
Provide helper functions for those users of ST-RAM that need
to be aware of the backing physical addresses.
Kudos to Geert for his hints on getting this started.
Signed-off-by: Michael Schmitz <schmitz@debian.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/include')
| -rw-r--r-- | arch/m68k/include/asm/atari_stram.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/atari_stram.h b/arch/m68k/include/asm/atari_stram.h index 62e27598af91..4e771c22d6a9 100644 --- a/arch/m68k/include/asm/atari_stram.h +++ b/arch/m68k/include/asm/atari_stram.h @@ -8,6 +8,8 @@ /* public interface */ void *atari_stram_alloc(unsigned long size, const char *owner); void atari_stram_free(void *); +void *atari_stram_to_virt(unsigned long phys); +unsigned long atari_stram_to_phys(void *); /* functions called internally by other parts of the kernel */ void atari_stram_init(void); |