diff options
Diffstat (limited to 'arch/powerpc/cpu/mpc85xx/fdt.c')
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/fdt.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/fdt.c b/arch/powerpc/cpu/mpc85xx/fdt.c index ed80a84180..85dfa5bc01 100644 --- a/arch/powerpc/cpu/mpc85xx/fdt.c +++ b/arch/powerpc/cpu/mpc85xx/fdt.c @@ -14,6 +14,7 @@ #include <linux/ctype.h> #include <asm/io.h> #include <asm/fsl_portals.h> +#include <hwconfig.h> #ifdef CONFIG_FSL_ESDHC #include <fsl_esdhc.h> #endif @@ -35,6 +36,11 @@ void ft_fixup_cpu(void *blob, u64 memory_limit) u32 bootpg = determine_mp_bootpg(NULL); u32 id = get_my_id(); const char *enable_method; +#if defined(T1040_TDM_QUIRK_CCSR_BASE) + int ret; + int tdm_hwconfig_enabled = 0; + char buffer[HWCONFIG_BUFFER_SIZE] = {0}; +#endif off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4); while (off != -FDT_ERR_NOTFOUND) { @@ -77,6 +83,26 @@ void ft_fixup_cpu(void *blob, u64 memory_limit) "device_type", "cpu", 4); } +#if defined(T1040_TDM_QUIRK_CCSR_BASE) +#define CONFIG_MEM_HOLE_16M 0x1000000 + /* + * Extract hwconfig from environment. + * Search for tdm entry in hwconfig. + */ + ret = getenv_f("hwconfig", buffer, sizeof(buffer)); + if (ret > 0) + tdm_hwconfig_enabled = hwconfig_f("tdm", buffer); + + /* Reserve the memory hole created by TDM LAW, so OSes dont use it */ + if (tdm_hwconfig_enabled) { + off = fdt_add_mem_rsv(blob, T1040_TDM_QUIRK_CCSR_BASE, + CONFIG_MEM_HOLE_16M); + if (off < 0) + printf("Failed to reserve memory for tdm: %s\n", + fdt_strerror(off)); + } +#endif + /* Reserve the boot page so OSes dont use it */ if ((u64)bootpg < memory_limit) { off = fdt_add_mem_rsv(blob, bootpg, (u64)4096); |