2 * PROM interface routines.
4 #include <linux/types.h>
5 #include <linux/init.h>
6 #include <linux/string.h>
7 #include <linux/ctype.h>
8 #include <linux/kernel.h>
10 #include <linux/bootmem.h>
11 #include <linux/ioport.h>
12 #include <asm/bootinfo.h>
13 #include <asm/lasat/lasat.h>
17 #include <asm/lasat/eeprom.h>
20 #define RESET_VECTOR 0xbfc00000
21 #define PROM_JUMP_TABLE_ENTRY(n) (*((u32 *)(RESET_VECTOR + 0x20) + n))
22 #define PROM_DISPLAY_ADDR PROM_JUMP_TABLE_ENTRY(0)
23 #define PROM_PUTC_ADDR PROM_JUMP_TABLE_ENTRY(1)
24 #define PROM_MONITOR_ADDR PROM_JUMP_TABLE_ENTRY(2)
26 static void null_prom_display(const char *string
, int pos
, int clear
)
30 static void null_prom_monitor(void)
34 static void null_prom_putc(char c
)
38 /* these are functions provided by the bootloader */
39 static void (*__prom_putc
)(char c
) = null_prom_putc
;
41 void prom_putchar(char c
)
46 void (*prom_display
)(const char *string
, int pos
, int clear
) =
48 void (*prom_monitor
)(void) = null_prom_monitor
;
50 unsigned int lasat_ndelay_divider
;
52 static void setup_prom_vectors(void)
54 u32 version
= *(u32
*)(RESET_VECTOR
+ 0x90);
57 prom_display
= (void *)PROM_DISPLAY_ADDR
;
58 __prom_putc
= (void *)PROM_PUTC_ADDR
;
59 prom_monitor
= (void *)PROM_MONITOR_ADDR
;
61 printk(KERN_DEBUG
"prom vectors set up\n");
64 static struct at93c_defs at93c_defs
[N_MACHTYPES
] = {
66 .reg
= (void *)AT93C_REG_100
,
67 .rdata_reg
= (void *)AT93C_RDATA_REG_100
,
68 .rdata_shift
= AT93C_RDATA_SHIFT_100
,
69 .wdata_shift
= AT93C_WDATA_SHIFT_100
,
71 .clk
= AT93C_CLK_M_100
73 .reg
= (void *)AT93C_REG_200
,
74 .rdata_reg
= (void *)AT93C_RDATA_REG_200
,
75 .rdata_shift
= AT93C_RDATA_SHIFT_200
,
76 .wdata_shift
= AT93C_WDATA_SHIFT_200
,
78 .clk
= AT93C_CLK_M_200
82 void __init
prom_init(void)
85 char **argv
= (char **) fw_arg1
;
90 printk(KERN_INFO
"LASAT 200 board\n");
91 lasat_ndelay_divider
= LASAT_200_DIVIDER
;
92 at93c
= &at93c_defs
[1];
94 printk(KERN_INFO
"LASAT 100 board\n");
95 lasat_ndelay_divider
= LASAT_100_DIVIDER
;
96 at93c
= &at93c_defs
[0];
99 lasat_init_board_info(); /* Read info from EEPROM */
101 /* Get the command line */
103 strncpy(arcs_cmdline
, argv
[0], COMMAND_LINE_SIZE
-1);
104 arcs_cmdline
[COMMAND_LINE_SIZE
-1] = '\0';
107 /* Set the I/O base address */
108 set_io_port_base(KSEG1
);
110 /* Set memory regions */
111 ioport_resource
.start
= 0;
112 ioport_resource
.end
= 0xffffffff; /* Wrong, fixme. */
114 add_memory_region(0, lasat_board_info
.li_memsize
, BOOT_MEM_RAM
);
117 void __init
prom_free_prom_memory(void)
121 const char *get_system_type(void)
123 return lasat_board_info
.li_bmstr
;
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