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| author | Greg Watson <jarrah@users.sourceforge.net> | 2004-03-07 22:24:05 +0000 |
|---|---|---|
| committer | Greg Watson <jarrah@users.sourceforge.net> | 2004-03-07 22:24:05 +0000 |
| commit | a3d26484cc98bc24a7d375a45637671dc6b67585 (patch) | |
| tree | 4387c6a538d0dd4198013e4758a200b503dfc5b2 /src/cpu | |
| parent | efa1f324afd56dae5c6917dd1715a3efaf3886e3 (diff) | |
| download | coreboot-a3d26484cc98bc24a7d375a45637671dc6b67585.tar.xz | |
*** empty log message ***
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1384 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/ppc/ppc7xx/Config.lb | 4 | ||||
| -rw-r--r-- | src/cpu/ppc/ppc7xx/cache.S | 23 | ||||
| -rw-r--r-- | src/cpu/ppc/ppc7xx/clock.c | 27 | ||||
| -rw-r--r-- | src/cpu/ppc/ppc7xx/ppc7xx.inc | 35 |
4 files changed, 58 insertions, 31 deletions
diff --git a/src/cpu/ppc/ppc7xx/Config.lb b/src/cpu/ppc/ppc7xx/Config.lb index 2f77272957..ec606552f1 100644 --- a/src/cpu/ppc/ppc7xx/Config.lb +++ b/src/cpu/ppc/ppc7xx/Config.lb @@ -17,3 +17,7 @@ default DCACHE_RAM_SIZE=16384 initinclude "FAMILY_INIT" cpu/ppc/ppc7xx/ppc7xx.inc +object clock.o +object cache.S +initobject clock.o +initobject cache.S diff --git a/src/cpu/ppc/ppc7xx/cache.S b/src/cpu/ppc/ppc7xx/cache.S new file mode 100644 index 0000000000..237b178bdf --- /dev/null +++ b/src/cpu/ppc/ppc7xx/cache.S @@ -0,0 +1,23 @@ +#define ASM +#include "ppcreg.h" +#include <ppc_asm.tmpl> + +#define NUM_CACHE_LINES 128*8 +#define L1_CACHE_LINE_SIZE 32 +#define cache_flush_buffer 0x1000 + +/* + * Flush data cache + * Do this by just reading lots of stuff into the cache. + */ +.globl flush_dcache +flush_dcache: + lis r3,cache_flush_buffer@h + ori r3,r3,cache_flush_buffer@l + li r4,NUM_CACHE_LINES + mtctr r4 +0: lwz r4,0(r3) + addi r3,r3,L1_CACHE_LINE_SIZE + bdnz 0b + blr + diff --git a/src/cpu/ppc/ppc7xx/clock.c b/src/cpu/ppc/ppc7xx/clock.c new file mode 100644 index 0000000000..b14f7c6f57 --- /dev/null +++ b/src/cpu/ppc/ppc7xx/clock.c @@ -0,0 +1,27 @@ +#include <ppc.h> + +static int PLL_multiplier[] = { + 25, /* 0000 - 2.5x */ + 75, /* 0001 - 7.5x */ + 70, /* 0010 - 7x */ + 10, /* 0011 - bypass */ + 20, /* 0100 - 2x */ + 65, /* 0101 - 6.5x */ + 100, /* 0110 - 10x */ + 45, /* 0111 - 4.5x */ + 30, /* 1000 - 3x */ + 55, /* 1001 - 5.5x */ + 40, /* 1010 - 4x */ + 50, /* 1011 - 5x */ + 80, /* 1100 - 8x */ + 60, /* 1101 - 6x */ + 35, /* 1110 - 3.5x */ + 0, /* 1111 - off */ +}; + +unsigned long +get_clock_speed(void) +{ + unsigned long clock = CONFIG_SYS_CLK_FREQ * 1000000; + return clock * PLL_multiplier[ppc_gethid1() >> 28] / 10; +} diff --git a/src/cpu/ppc/ppc7xx/ppc7xx.inc b/src/cpu/ppc/ppc7xx/ppc7xx.inc index 3391b28a44..c82ab2f370 100644 --- a/src/cpu/ppc/ppc7xx/ppc7xx.inc +++ b/src/cpu/ppc/ppc7xx/ppc7xx.inc @@ -56,37 +56,10 @@ /* * Clear segment registers (LinuxBIOS doesn't use these) */ - mtsr 0, r0 - isync - mtsr 1, r0 - isync - mtsr 2, r0 - isync - mtsr 3, r0 - isync - mtsr 4, r0 - isync - mtsr 5, r0 - isync - mtsr 6, r0 - isync - mtsr 7, r0 - isync - mtsr 8, r0 - isync - mtsr 9, r0 - isync - mtsr 10, r0 - isync - mtsr 11, r0 - isync - mtsr 12, r0 - isync - mtsr 13, r0 - isync - mtsr 14, r0 - isync - mtsr 15, r0 + li r3, 15 +1: mtsrin r3, r0 + subic. r3, r3, 1 + bge 1b isync /* |