diff options
Diffstat (limited to 'target/linux/ifxmips/files-2.6.30/arch/mips/ifxmips/prom.c')
| -rw-r--r-- | target/linux/ifxmips/files-2.6.30/arch/mips/ifxmips/prom.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/target/linux/ifxmips/files-2.6.30/arch/mips/ifxmips/prom.c b/target/linux/ifxmips/files-2.6.30/arch/mips/ifxmips/prom.c new file mode 100644 index 0000000000..ef5a68a819 --- /dev/null +++ b/target/linux/ifxmips/files-2.6.30/arch/mips/ifxmips/prom.c @@ -0,0 +1,157 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright (C) 2005 Wu Qi Ming infineon + * Copyright (C) 2007 John Crispin <blogic@openwrt.org> + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/bootmem.h> + +#include <asm/bootinfo.h> + +#include <ifxmips.h> + +static char buf[1024]; /* for prom_printf() */ + +/* for voice cpu (MIPS24K) */ +unsigned int *prom_cp1_base; +unsigned int prom_cp1_size; + +/* for Multithreading (APRP) on MIPS34K */ +unsigned long physical_memsize; + +/* early printk on asc0 or asc1 ? */ +#ifdef CONFIG_IFXMIPS_PROM_ASC0 +#define IFXMIPS_ASC_DIFF 0 +#else +#define IFXMIPS_ASC_DIFF IFXMIPS_ASC_BASE_DIFF +#endif + +static inline u32 asc_r32(unsigned long r) +{ + return ifxmips_r32((u32 *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_DIFF + r)); +} + +static inline void asc_w32(u32 v, unsigned long r) +{ + ifxmips_w32(v, (u32 *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_DIFF + r)); +} + +void prom_free_prom_memory(void) +{ +} + +void prom_putchar(char c) +{ + unsigned long flags; + + local_irq_save(flags); + while ((asc_r32(IFXMIPS_ASC_FSTAT) & ASCFSTAT_TXFFLMASK) >> ASCFSTAT_TXFFLOFF) + ; + + if (c == '\n') + asc_w32('\r', IFXMIPS_ASC_TBUF); + asc_w32(c, IFXMIPS_ASC_TBUF); + local_irq_restore(flags); +} + +void prom_printf(const char *fmt, ...) +{ + va_list args; + int l; + char *p, *buf_end; + + va_start(args, fmt); + l = vsprintf(buf, fmt, args); + va_end(args); + buf_end = buf + l; + + for (p = buf; p < buf_end; p++) + prom_putchar(*p); +} + +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); + +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; + + mips_machtype = MACH_INFINEON_IFXMIPS; + + 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)) { + prom_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); + + prom_printf("Using %dMB Ram and reserving %dMB for cp1\n", + memsize>>20, prom_cp1_size>>20); + } + + add_memory_region(0x00000000, memsize, BOOT_MEM_RAM); +} |