1 /*
2 * PROM interface routines.
3 */
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>
9 #include <linux/mm.h>
10 #include <linux/bootmem.h>
11 #include <linux/ioport.h>
12 #include <asm/bootinfo.h>
13 #include <asm/lasat/lasat.h>
14 #include <asm/cpu.h>
15
16 #include "at93c.h"
17 #include <asm/lasat/eeprom.h>
18 #include "prom.h"
19
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)
25
26 static void null_prom_display(const char *string, int pos, int clear)
27 {
28 }
29
30 static void null_prom_monitor(void)
31 {
32 }
33
34 static void null_prom_putc(char c)
35 {
36 }
37
38 /* these are functions provided by the bootloader */
39 static void (*__prom_putc)(char c) = null_prom_putc;
40
41 void prom_putchar(char c)
42 {
43 __prom_putc(c);
44 }
45
46 void (*prom_display)(const char *string, int pos, int clear) =
47 null_prom_display;
48 void (*prom_monitor)(void) = null_prom_monitor;
49
50 unsigned int lasat_ndelay_divider;
51
52 static void setup_prom_vectors(void)
53 {
54 u32 version = *(u32 *)(RESET_VECTOR + 0x90);
55
56 if (version >= 307) {
57 prom_display = (void *)PROM_DISPLAY_ADDR;
58 __prom_putc = (void *)PROM_PUTC_ADDR;
59 prom_monitor = (void *)PROM_MONITOR_ADDR;
60 }
61 printk(KERN_DEBUG "prom vectors set up\n");
62 }
63
64 static struct at93c_defs at93c_defs[N_MACHTYPES] = {
65 {
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,
70 .cs = AT93C_CS_M_100,
71 .clk = AT93C_CLK_M_100
72 }, {
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,
77 .cs = AT93C_CS_M_200,
78 .clk = AT93C_CLK_M_200
79 },
80 };
81
82 void __init prom_init(void)
83 {
84 int argc = fw_arg0;
85 char **argv = (char **) fw_arg1;
86
87 setup_prom_vectors();
88
89 if (IS_LASAT_200()) {
90 printk(KERN_INFO "LASAT 200 board\n");
91 lasat_ndelay_divider = LASAT_200_DIVIDER;
92 at93c = &at93c_defs[1];
93 } else {
94 printk(KERN_INFO "LASAT 100 board\n");
95 lasat_ndelay_divider = LASAT_100_DIVIDER;
96 at93c = &at93c_defs[0];
97 }
98
99 lasat_init_board_info(); /* Read info from EEPROM */
100
101 /* Get the command line */
102 if (argc > 0) {
103 strncpy(arcs_cmdline, argv[0], COMMAND_LINE_SIZE-1);
104 arcs_cmdline[COMMAND_LINE_SIZE-1] = '\0';
105 }
106
107 /* Set the I/O base address */
108 set_io_port_base(KSEG1);
109
110 /* Set memory regions */
111 ioport_resource.start = 0;
112 ioport_resource.end = 0xffffffff; /* Wrong, fixme. */
113
114 add_memory_region(0, lasat_board_info.li_memsize, BOOT_MEM_RAM);
115 }
116
117 void __init prom_free_prom_memory(void)
118 {
119 }
120
121 const char *get_system_type(void)
122 {
123 return lasat_board_info.li_bmstr;
124 }
125
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