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author | Brian Murphy <brm@murphy.dk> | 2007-08-21 22:34:16 +0200 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2007-10-12 00:46:00 +0200 |
commit | 1f21d2bde0046e959b53756f74d96dfd040a803b (patch) | |
tree | 5ca1a0319982f1e665e57f22bd1dae1d90b07e35 /arch/mips/lasat/prom.c | |
parent | [MIPS] fix ABI check in include/asm-mips/arv/hinv.h (diff) | |
download | linux-1f21d2bde0046e959b53756f74d96dfd040a803b.tar.xz linux-1f21d2bde0046e959b53756f74d96dfd040a803b.zip |
[MIPS] Add back support for LASAT platforms
Signed-off-by: Brian Murphy <brian@murphy.dk>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/lasat/prom.c')
-rw-r--r-- | arch/mips/lasat/prom.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/arch/mips/lasat/prom.c b/arch/mips/lasat/prom.c new file mode 100644 index 000000000000..4b80fffcf262 --- /dev/null +++ b/arch/mips/lasat/prom.c @@ -0,0 +1,128 @@ +/* + * PROM interface routines. + */ +#include <linux/types.h> +#include <linux/init.h> +#include <linux/string.h> +#include <linux/ctype.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/bootmem.h> +#include <linux/ioport.h> +#include <asm/bootinfo.h> +#include <asm/lasat/lasat.h> +#include <asm/cpu.h> + +#include "at93c.h" +#include <asm/lasat/eeprom.h> +#include "prom.h" + +#define RESET_VECTOR 0xbfc00000 +#define PROM_JUMP_TABLE_ENTRY(n) (*((u32 *)(RESET_VECTOR + 0x20) + n)) +#define PROM_DISPLAY_ADDR PROM_JUMP_TABLE_ENTRY(0) +#define PROM_PUTC_ADDR PROM_JUMP_TABLE_ENTRY(1) +#define PROM_MONITOR_ADDR PROM_JUMP_TABLE_ENTRY(2) + +static void null_prom_display(const char *string, int pos, int clear) +{ +} + +static void null_prom_monitor(void) +{ +} + +static void null_prom_putc(char c) +{ +} + +/* these are functions provided by the bootloader */ +static void (*__prom_putc)(char c) = null_prom_putc; + +void prom_putchar(char c) +{ + __prom_putc(c); +} + +void (*prom_display)(const char *string, int pos, int clear) = + null_prom_display; +void (*prom_monitor)(void) = null_prom_monitor; + +unsigned int lasat_ndelay_divider; + +static void setup_prom_vectors(void) +{ + u32 version = *(u32 *)(RESET_VECTOR + 0x90); + + if (version >= 307) { + prom_display = (void *)PROM_DISPLAY_ADDR; + __prom_putc = (void *)PROM_PUTC_ADDR; + prom_monitor = (void *)PROM_MONITOR_ADDR; + } + printk(KERN_DEBUG "prom vectors set up\n"); +} + +static struct at93c_defs at93c_defs[N_MACHTYPES] = { + { + .reg = (void *)AT93C_REG_100, + .rdata_reg = (void *)AT93C_RDATA_REG_100, + .rdata_shift = AT93C_RDATA_SHIFT_100, + .wdata_shift = AT93C_WDATA_SHIFT_100, + .cs = AT93C_CS_M_100, + .clk = AT93C_CLK_M_100 + }, { + .reg = (void *)AT93C_REG_200, + .rdata_reg = (void *)AT93C_RDATA_REG_200, + .rdata_shift = AT93C_RDATA_SHIFT_200, + .wdata_shift = AT93C_WDATA_SHIFT_200, + .cs = AT93C_CS_M_200, + .clk = AT93C_CLK_M_200 + }, +}; + +void __init prom_init(void) +{ + int argc = fw_arg0; + char **argv = (char **) fw_arg1; + + setup_prom_vectors(); + + if (current_cpu_data.cputype == CPU_R5000) { + printk(KERN_INFO "LASAT 200 board\n"); + mips_machtype = MACH_LASAT_200; + lasat_ndelay_divider = LASAT_200_DIVIDER; + } else { + printk(KERN_INFO "LASAT 100 board\n"); + mips_machtype = MACH_LASAT_100; + lasat_ndelay_divider = LASAT_100_DIVIDER; + } + + at93c = &at93c_defs[mips_machtype]; + + lasat_init_board_info(); /* Read info from EEPROM */ + + mips_machgroup = MACH_GROUP_LASAT; + + /* Get the command line */ + if (argc > 0) { + strncpy(arcs_cmdline, argv[0], CL_SIZE-1); + arcs_cmdline[CL_SIZE-1] = '\0'; + } + + /* Set the I/O base address */ + set_io_port_base(KSEG1); + + /* Set memory regions */ + ioport_resource.start = 0; + ioport_resource.end = 0xffffffff; /* Wrong, fixme. */ + + add_memory_region(0, lasat_board_info.li_memsize, BOOT_MEM_RAM); +} + +void __init prom_free_prom_memory(void) +{ +} + +const char *get_system_type(void) +{ + return lasat_board_info.li_bmstr; +} |