From fded332bf40349788c83399751fd3764fddc4b51 Mon Sep 17 00:00:00 2001 From: Michael Schmitz Date: Mon, 31 Mar 2014 21:06:05 +1300 Subject: 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 Signed-off-by: Geert Uytterhoeven --- arch/m68k/include/asm/atari_stram.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/m68k/include/asm/atari_stram.h') 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); -- cgit v1.2.3