From d65cfe89ecdd9de1ddc2d3ebdfa9ab271e2d4415 Mon Sep 17 00:00:00 2001 From: Jon Loeliger Date: Mon, 25 Jul 2005 10:58:39 -0500 Subject: * Patch by Jon Loeliger 2005-02-08 Determine L2 Cache size dynamically on 85XX boards. --- cpu/mpc85xx/cpu_init.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'cpu/mpc85xx/cpu_init.c') diff --git a/cpu/mpc85xx/cpu_init.c b/cpu/mpc85xx/cpu_init.c index 4d6438fd4d6..79ea91f22ad 100644 --- a/cpu/mpc85xx/cpu_init.c +++ b/cpu/mpc85xx/cpu_init.c @@ -188,6 +188,21 @@ int cpu_init_r (void) volatile ccsr_l2cache_t *l2cache = &immap->im_l2cache; volatile uint temp; + asm("msync;isync"); + temp = l2cache->l2ctl; + temp &= 0x30000000; + switch ( temp ) { + case 0x20000000: + printf ("L2 cache 256KB:"); + break; + case 0x00000000: + case 0x10000000: + case 0x30000000: + default: + printf ("L2 cache unknown size. Check the silicon!\n"); + return -1; + } + asm("msync;isync"); l2cache->l2ctl = 0x68000000; /* invalidate */ temp = l2cache->l2ctl; @@ -196,7 +211,7 @@ int cpu_init_r (void) temp = l2cache->l2ctl; asm("msync;isync"); - printf("L2: 256 kB enabled\n"); + printf("enabled\n"); #else printf("L2: disabled.\n"); #endif -- cgit v1.2.3