Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 1995 Linus Torvalds |
3 | * Adapted from 'alpha' version by Gary Thomas | |
4 | * Modified by Cort Dougan (cort@cs.nmt.edu) | |
5 | * Modified for MBX using prep/chrp/pmac functions by Dan (dmalek@jlc.net) | |
6 | * Further modified for generic 8xx and 8260 by Dan. | |
7 | */ | |
8 | ||
9 | #include <linux/config.h> | |
10 | #include <linux/sched.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/mm.h> | |
13 | #include <linux/stddef.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/initrd.h> | |
17 | #include <linux/root_dev.h> | |
18 | #include <linux/seq_file.h> | |
19 | #include <linux/irq.h> | |
20 | ||
21 | #include <asm/mmu.h> | |
22 | #include <asm/io.h> | |
23 | #include <asm/pgtable.h> | |
24 | #include <asm/mpc8260.h> | |
d054b5ac | 25 | #include <asm/cpm2.h> |
1da177e4 LT |
26 | #include <asm/machdep.h> |
27 | #include <asm/bootinfo.h> | |
28 | #include <asm/time.h> | |
29 | ||
30 | #include "cpm2_pic.h" | |
31 | ||
32 | unsigned char __res[sizeof(bd_t)]; | |
33 | ||
a6dbba77 VB |
34 | extern void pq2_find_bridges(void); |
35 | extern void pq2pci_init_irq(void); | |
1da177e4 LT |
36 | extern void idma_pci9_init(void); |
37 | ||
38 | /* Place-holder for board-specific init */ | |
39 | void __attribute__ ((weak)) __init | |
40 | m82xx_board_setup(void) | |
41 | { | |
42 | } | |
43 | ||
44 | static void __init | |
45 | m8260_setup_arch(void) | |
46 | { | |
47 | /* Print out Vendor and Machine info. */ | |
48 | printk(KERN_INFO "%s %s port\n", CPUINFO_VENDOR, CPUINFO_MACHINE); | |
49 | ||
50 | /* Reset the Communication Processor Module. */ | |
51 | cpm2_reset(); | |
52 | #ifdef CONFIG_8260_PCI9 | |
53 | /* Initialise IDMA for PCI erratum workaround */ | |
54 | idma_pci9_init(); | |
55 | #endif | |
56 | #ifdef CONFIG_PCI_8260 | |
a6dbba77 | 57 | pq2_find_bridges(); |
1da177e4 LT |
58 | #endif |
59 | #ifdef CONFIG_BLK_DEV_INITRD | |
60 | if (initrd_start) | |
61 | ROOT_DEV = Root_RAM0; | |
62 | #endif | |
1461b4ea VB |
63 | |
64 | identify_ppc_sys_by_name_and_id(BOARD_CHIP_NAME, | |
65 | in_be32(CPM_MAP_ADDR + CPM_IMMR_OFFSET)); | |
66 | ||
1da177e4 LT |
67 | m82xx_board_setup(); |
68 | } | |
69 | ||
70 | /* The decrementer counts at the system (internal) clock frequency | |
71 | * divided by four. | |
72 | */ | |
73 | static void __init | |
74 | m8260_calibrate_decr(void) | |
75 | { | |
76 | bd_t *binfo = (bd_t *)__res; | |
77 | int freq, divisor; | |
78 | ||
79 | freq = binfo->bi_busfreq; | |
80 | divisor = 4; | |
81 | tb_ticks_per_jiffy = freq / HZ / divisor; | |
82 | tb_to_us = mulhwu_scale_factor(freq / divisor, 1000000); | |
83 | } | |
84 | ||
85 | /* The 8260 has an internal 1-second timer update register that | |
86 | * we should use for this purpose. | |
87 | */ | |
88 | static uint rtc_time; | |
89 | ||
90 | static int | |
91 | m8260_set_rtc_time(unsigned long time) | |
92 | { | |
93 | rtc_time = time; | |
94 | ||
95 | return(0); | |
96 | } | |
97 | ||
98 | static unsigned long | |
99 | m8260_get_rtc_time(void) | |
100 | { | |
101 | /* Get time from the RTC. | |
102 | */ | |
103 | return((unsigned long)rtc_time); | |
104 | } | |
105 | ||
106 | #ifndef BOOTROM_RESTART_ADDR | |
107 | #warning "Using default BOOTROM_RESTART_ADDR!" | |
108 | #define BOOTROM_RESTART_ADDR 0xff000104 | |
109 | #endif | |
110 | ||
111 | static void | |
112 | m8260_restart(char *cmd) | |
113 | { | |
114 | extern void m8260_gorom(bd_t *bi, uint addr); | |
115 | uint startaddr; | |
116 | ||
117 | /* Most boot roms have a warmstart as the second instruction | |
118 | * of the reset vector. If that doesn't work for you, change this | |
119 | * or the reboot program to send a proper address. | |
120 | */ | |
121 | startaddr = BOOTROM_RESTART_ADDR; | |
122 | if (cmd != NULL) { | |
123 | if (!strncmp(cmd, "startaddr=", 10)) | |
124 | startaddr = simple_strtoul(&cmd[10], NULL, 0); | |
125 | } | |
126 | ||
127 | m8260_gorom((void*)__pa(__res), startaddr); | |
128 | } | |
129 | ||
130 | static void | |
131 | m8260_halt(void) | |
132 | { | |
133 | local_irq_disable(); | |
134 | while (1); | |
135 | } | |
136 | ||
137 | static void | |
138 | m8260_power_off(void) | |
139 | { | |
140 | m8260_halt(); | |
141 | } | |
142 | ||
143 | static int | |
144 | m8260_show_cpuinfo(struct seq_file *m) | |
145 | { | |
146 | bd_t *bp = (bd_t *)__res; | |
147 | ||
148 | seq_printf(m, "vendor\t\t: %s\n" | |
149 | "machine\t\t: %s\n" | |
150 | "\n" | |
151 | "mem size\t\t: 0x%08x\n" | |
152 | "console baud\t\t: %d\n" | |
153 | "\n" | |
154 | "core clock\t: %u MHz\n" | |
155 | "CPM clock\t: %u MHz\n" | |
156 | "bus clock\t: %u MHz\n", | |
157 | CPUINFO_VENDOR, CPUINFO_MACHINE, bp->bi_memsize, | |
158 | bp->bi_baudrate, bp->bi_intfreq / 1000000, | |
159 | bp->bi_cpmfreq / 1000000, bp->bi_busfreq / 1000000); | |
160 | return 0; | |
161 | } | |
162 | ||
163 | /* Initialize the internal interrupt controller. The number of | |
164 | * interrupts supported can vary with the processor type, and the | |
165 | * 8260 family can have up to 64. | |
166 | * External interrupts can be either edge or level triggered, and | |
167 | * need to be initialized by the appropriate driver. | |
168 | */ | |
169 | static void __init | |
170 | m8260_init_IRQ(void) | |
171 | { | |
172 | cpm2_init_IRQ(); | |
173 | ||
174 | /* Initialize the default interrupt mapping priorities, | |
175 | * in case the boot rom changed something on us. | |
176 | */ | |
177 | cpm2_immr->im_intctl.ic_siprr = 0x05309770; | |
a6dbba77 VB |
178 | |
179 | #if defined(CONFIG_PCI) && (defined(CONFIG_ADS8272) || defined(CONFIG_PQ2FADS)) | |
180 | /* Initialize stuff for the 82xx CPLD IC and install demux */ | |
181 | pq2pci_init_irq(); | |
182 | #endif | |
183 | ||
1da177e4 LT |
184 | } |
185 | ||
186 | /* | |
187 | * Same hack as 8xx | |
188 | */ | |
189 | static unsigned long __init | |
190 | m8260_find_end_of_memory(void) | |
191 | { | |
192 | bd_t *binfo = (bd_t *)__res; | |
193 | ||
194 | return binfo->bi_memsize; | |
195 | } | |
196 | ||
197 | /* Map the IMMR, plus anything else we can cover | |
198 | * in that upper space according to the memory controller | |
199 | * chip select mapping. Grab another bunch of space | |
200 | * below that for stuff we can't cover in the upper. | |
201 | */ | |
202 | static void __init | |
203 | m8260_map_io(void) | |
204 | { | |
205 | uint addr; | |
206 | ||
207 | /* Map IMMR region to a 256MB BAT */ | |
208 | addr = (cpm2_immr != NULL) ? (uint)cpm2_immr : CPM_MAP_ADDR; | |
209 | io_block_mapping(addr, addr, 0x10000000, _PAGE_IO); | |
210 | ||
211 | /* Map I/O region to a 256MB BAT */ | |
212 | io_block_mapping(IO_VIRT_ADDR, IO_PHYS_ADDR, 0x10000000, _PAGE_IO); | |
213 | } | |
214 | ||
215 | /* Place-holder for board-specific ppc_md hooking */ | |
216 | void __attribute__ ((weak)) __init | |
217 | m82xx_board_init(void) | |
218 | { | |
219 | } | |
220 | ||
221 | /* Inputs: | |
222 | * r3 - Optional pointer to a board information structure. | |
223 | * r4 - Optional pointer to the physical starting address of the init RAM | |
224 | * disk. | |
225 | * r5 - Optional pointer to the physical ending address of the init RAM | |
226 | * disk. | |
227 | * r6 - Optional pointer to the physical starting address of any kernel | |
228 | * command-line parameters. | |
229 | * r7 - Optional pointer to the physical ending address of any kernel | |
230 | * command-line parameters. | |
231 | */ | |
232 | void __init | |
233 | platform_init(unsigned long r3, unsigned long r4, unsigned long r5, | |
234 | unsigned long r6, unsigned long r7) | |
235 | { | |
236 | parse_bootinfo(find_bootinfo()); | |
237 | ||
238 | if ( r3 ) | |
239 | memcpy( (void *)__res,(void *)(r3+KERNELBASE), sizeof(bd_t) ); | |
240 | ||
241 | #ifdef CONFIG_BLK_DEV_INITRD | |
242 | /* take care of initrd if we have one */ | |
243 | if ( r4 ) { | |
244 | initrd_start = r4 + KERNELBASE; | |
245 | initrd_end = r5 + KERNELBASE; | |
246 | } | |
247 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
248 | /* take care of cmd line */ | |
249 | if ( r6 ) { | |
250 | *(char *)(r7+KERNELBASE) = 0; | |
251 | strcpy(cmd_line, (char *)(r6+KERNELBASE)); | |
252 | } | |
253 | ||
254 | ppc_md.setup_arch = m8260_setup_arch; | |
255 | ppc_md.show_cpuinfo = m8260_show_cpuinfo; | |
256 | ppc_md.init_IRQ = m8260_init_IRQ; | |
257 | ppc_md.get_irq = cpm2_get_irq; | |
258 | ||
259 | ppc_md.restart = m8260_restart; | |
260 | ppc_md.power_off = m8260_power_off; | |
261 | ppc_md.halt = m8260_halt; | |
262 | ||
263 | ppc_md.set_rtc_time = m8260_set_rtc_time; | |
264 | ppc_md.get_rtc_time = m8260_get_rtc_time; | |
265 | ppc_md.calibrate_decr = m8260_calibrate_decr; | |
266 | ||
267 | ppc_md.find_end_of_memory = m8260_find_end_of_memory; | |
268 | ppc_md.setup_io_mappings = m8260_map_io; | |
269 | ||
270 | /* Call back for board-specific settings and overrides. */ | |
271 | m82xx_board_init(); | |
272 | } |