diff options
Diffstat (limited to 'target/linux/ifxmips/files-2.6.33/arch/mips/ifxmips/common/prom.c')
-rw-r--r-- | target/linux/ifxmips/files-2.6.33/arch/mips/ifxmips/common/prom.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/target/linux/ifxmips/files-2.6.33/arch/mips/ifxmips/common/prom.c b/target/linux/ifxmips/files-2.6.33/arch/mips/ifxmips/common/prom.c new file mode 100644 index 0000000000..98de8fb5cc --- /dev/null +++ b/target/linux/ifxmips/files-2.6.33/arch/mips/ifxmips/common/prom.c @@ -0,0 +1,131 @@ +#include <linux/init.h> +#include <linux/module.h> +#include <linux/bootmem.h> +#include <linux/etherdevice.h> + +#include <asm/bootinfo.h> + +#include <ifxmips.h> +#include <ifxmips_prom.h> + +/* for voice cpu (MIPS24K) */ +unsigned int *prom_cp1_base; +unsigned int prom_cp1_size; + +/* for Multithreading (APRP) on MIPS34K */ +unsigned long physical_memsize; + +void +prom_free_prom_memory(void) +{ +} + +unsigned int* +prom_get_cp1_base(void) +{ + return prom_cp1_base; +} +EXPORT_SYMBOL(prom_get_cp1_base); + +unsigned int +prom_get_cp1_size(void) +{ + /* return size im MB */ + return prom_cp1_size>>20; +} +EXPORT_SYMBOL(prom_get_cp1_size); + +extern unsigned char ifxmips_ethaddr[6]; +int cmdline_mac = 0; + +static int __init +ifxmips_set_ethaddr(char *str) +{ +#define IS_HEX(x) \ + (((x >= '0' && x <= '9') || (x >= 'a' && x <= 'f') \ + || (x >= 'A' && x <= 'F')) ? (1) : (0)) + int i; + str = strchr(str, '='); + if (!str) + goto out; + str++; + if (strlen(str) != 17) + goto out; + for (i = 0; i < 6; i++) { + if (!IS_HEX(str[3 * i]) || !IS_HEX(str[(3 * i) + 1])) + goto out; + if ((i != 5) && (str[(3 * i) + 2] != ':')) + goto out; + ifxmips_ethaddr[i] = simple_strtoul(&str[3 * i], NULL, 16); + } + if (is_valid_ether_addr(ifxmips_ethaddr)) + cmdline_mac = 1; +out: + return 1; +} +__setup("ethaddr", ifxmips_set_ethaddr); + +void __init +prom_init(void) +{ + int argc = fw_arg0; + char **argv = (char **) fw_arg1; + char **envp = (char **) fw_arg2; + + int memsize = 16; /* assume 16M as default */ + int i; + + if (argc) + { + argv = (char **)KSEG1ADDR((unsigned long)argv); + arcs_cmdline[0] = '\0'; + for (i = 1; i < argc; i++) + { + char *a = (char *)KSEG1ADDR(argv[i]); + if (!argv[i]) + continue; + /* for voice cpu on Twinpass/Danube */ + if (cpu_data[0].cputype == CPU_24K) + if (!strncmp(a, "cp1_size=", 9)) + { + prom_cp1_size = memparse(a + 9, &a); + continue; + } + if (strlen(arcs_cmdline) + strlen(a + 1) >= sizeof(arcs_cmdline)) + { + early_printf("cmdline overflow, skipping: %s\n", a); + break; + } + strcat(arcs_cmdline, a); + strcat(arcs_cmdline, " "); + } + if (!*arcs_cmdline) + strcpy(&(arcs_cmdline[0]), + "console=ttyS0,115200 rootfstype=squashfs,jffs2"); + } + envp = (char **)KSEG1ADDR((unsigned long)envp); + while (*envp) + { + char *e = (char *)KSEG1ADDR(*envp); + + if (!strncmp(e, "memsize=", 8)) + { + e += 8; + memsize = simple_strtoul(e, NULL, 10); + } + envp++; + } + memsize *= 1024 * 1024; + + /* only on Twinpass/Danube a second CPU is used for Voice */ + if ((cpu_data[0].cputype == CPU_24K) && (prom_cp1_size)) + { + memsize -= prom_cp1_size; + prom_cp1_base = (unsigned int *)KSEG1ADDR(memsize); + + early_printf("Using %dMB Ram and reserving %dMB for cp1\n", + memsize>>20, prom_cp1_size>>20); + } + + add_memory_region(0x00000000, memsize, BOOT_MEM_RAM); +} |