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| author | Michael Broughton <mbobowik@telusplanet.net> | 2006-12-04 07:27:29 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-04 16:26:12 (GMT) |
| commit | 552984050958fc0f51bff38948d0bf4d31ea2b03 (patch) | |
| tree | 525c285442d1ef0c7c4f47cd796fa4add8a5e979 /arch | |
| parent | 1bddcc50c27c8ca39a62a1d37e3928707be8f850 (diff) | |
| download | linux-552984050958fc0f51bff38948d0bf4d31ea2b03.tar.xz | |
[PATCH] m68knommu: auto detect memory size on M5208EVB board
Here is a small patch to automatically detect the DRAM size on m520x.
It was generated against 2.6.17-uc0, and tested on an Intec 5208 dev board.
Signed-off-by: Michael Broughton <mbobowik@telusplanet.net>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/m68knommu/platform/5307/head.S | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/m68knommu/platform/5307/head.S b/arch/m68knommu/platform/5307/head.S index f2edb64..b9aa0ca 100644 --- a/arch/m68knommu/platform/5307/head.S +++ b/arch/m68knommu/platform/5307/head.S @@ -64,6 +64,26 @@ negl %d0 /* negate bits */ .endm +#elif defined(CONFIG_M520x) +.macro GET_MEM_SIZE + clrl %d0 + movel MCF_MBAR+MCFSIM_SDCS0, %d2 /* Get SDRAM chip select 0 config */ + andl #0x1f, %d2 /* Get only the chip select size */ + beq 3f /* Check if it is enabled */ + addql #1, %d2 /* Form exponent */ + moveql #1, %d0 + lsll %d2, %d0 /* 2 ^ exponent */ +3: + movel MCF_MBAR+MCFSIM_SDCS1, %d2 /* Get SDRAM chip select 1 config */ + andl #0x1f, %d2 /* Get only the chip select size */ + beq 4f /* Check if it is enabled */ + addql #1, %d2 /* Form exponent */ + moveql #1, %d1 + lsll %d2, %d1 /* 2 ^ exponent */ + addl %d1, %d0 /* Total size of SDRAM in d0 */ +4: +.endm + #else #error "ERROR: I don't know how to probe your boards memory size?" #endif |