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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation | |
1da177e4 LT |
4 | */ |
5 | ||
1da177e4 LT |
6 | #include <linux/init.h> |
7 | #include <linux/kernel.h> | |
8 | #include <linux/linkage.h> | |
9 | #include <linux/mm.h> | |
10 | #include <linux/blkdev.h> | |
57c8a661 | 11 | #include <linux/memblock.h> |
fcdb27ad | 12 | #include <linux/pm.h> |
1da177e4 LT |
13 | #include <linux/smp.h> |
14 | ||
15 | #include <asm/bootinfo.h> | |
16 | #include <asm/reboot.h> | |
5c93316c | 17 | #include <asm/setup.h> |
1da177e4 | 18 | #include <asm/sibyte/board.h> |
87353d8a | 19 | #include <asm/smp-ops.h> |
1da177e4 | 20 | |
df78b5c8 AJ |
21 | #include <asm/fw/cfe/cfe_api.h> |
22 | #include <asm/fw/cfe/cfe_error.h> | |
1da177e4 LT |
23 | |
24 | /* Max ram addressable in 32-bit segments */ | |
875d43e7 | 25 | #ifdef CONFIG_64BIT |
1da177e4 LT |
26 | #define MAX_RAM_SIZE (~0ULL) |
27 | #else | |
28 | #ifdef CONFIG_HIGHMEM | |
34adb28d | 29 | #ifdef CONFIG_PHYS_ADDR_T_64BIT |
1da177e4 LT |
30 | #define MAX_RAM_SIZE (~0ULL) |
31 | #else | |
32 | #define MAX_RAM_SIZE (0xffffffffULL) | |
33 | #endif | |
34 | #else | |
35 | #define MAX_RAM_SIZE (0x1fffffffULL) | |
36 | #endif | |
37 | #endif | |
38 | ||
39 | #define SIBYTE_MAX_MEM_REGIONS 8 | |
15d45cce RB |
40 | phys_addr_t board_mem_region_addrs[SIBYTE_MAX_MEM_REGIONS]; |
41 | phys_addr_t board_mem_region_sizes[SIBYTE_MAX_MEM_REGIONS]; | |
1da177e4 LT |
42 | unsigned int board_mem_region_count; |
43 | ||
44 | int cfe_cons_handle; | |
45 | ||
46 | #ifdef CONFIG_BLK_DEV_INITRD | |
47 | extern unsigned long initrd_start, initrd_end; | |
48 | #endif | |
49 | ||
b3f6df9f | 50 | static void __noreturn cfe_linux_exit(void *arg) |
1da177e4 LT |
51 | { |
52 | int warm = *(int *)arg; | |
53 | ||
54 | if (smp_processor_id()) { | |
55 | static int reboot_smp; | |
56 | ||
57 | /* Don't repeat the process from another CPU */ | |
58 | if (!reboot_smp) { | |
59 | /* Get CPU 0 to do the cfe_exit */ | |
60 | reboot_smp = 1; | |
8691e5a8 | 61 | smp_call_function(cfe_linux_exit, arg, 0); |
1da177e4 LT |
62 | } |
63 | } else { | |
64 | printk("Passing control back to CFE...\n"); | |
65 | cfe_exit(warm, 0); | |
66 | printk("cfe_exit returned??\n"); | |
67 | } | |
68 | while (1); | |
69 | } | |
70 | ||
b3f6df9f | 71 | static void __noreturn cfe_linux_restart(char *command) |
1da177e4 LT |
72 | { |
73 | static const int zero; | |
74 | ||
75 | cfe_linux_exit((void *)&zero); | |
76 | } | |
77 | ||
b3f6df9f | 78 | static void __noreturn cfe_linux_halt(void) |
1da177e4 LT |
79 | { |
80 | static const int one = 1; | |
81 | ||
82 | cfe_linux_exit((void *)&one); | |
83 | } | |
84 | ||
85 | static __init void prom_meminit(void) | |
86 | { | |
34adb28d | 87 | u64 addr, size, type; /* regardless of PHYS_ADDR_T_64BIT */ |
1da177e4 LT |
88 | int mem_flags = 0; |
89 | unsigned int idx; | |
90 | int rd_flag; | |
91 | #ifdef CONFIG_BLK_DEV_INITRD | |
92 | unsigned long initrd_pstart; | |
93 | unsigned long initrd_pend; | |
94 | ||
95 | initrd_pstart = CPHYSADDR(initrd_start); | |
96 | initrd_pend = CPHYSADDR(initrd_end); | |
97 | if (initrd_start && | |
98 | ((initrd_pstart > MAX_RAM_SIZE) | |
99 | || (initrd_pend > MAX_RAM_SIZE))) { | |
100 | panic("initrd out of addressable memory"); | |
101 | } | |
102 | ||
103 | #endif /* INITRD */ | |
104 | ||
105 | for (idx = 0; cfe_enummem(idx, mem_flags, &addr, &size, &type) != CFE_ERR_NOMORE; | |
106 | idx++) { | |
107 | rd_flag = 0; | |
108 | if (type == CFE_MI_AVAILABLE) { | |
109 | /* | |
110 | * See if this block contains (any portion of) the | |
111 | * ramdisk | |
112 | */ | |
113 | #ifdef CONFIG_BLK_DEV_INITRD | |
114 | if (initrd_start) { | |
115 | if ((initrd_pstart > addr) && | |
116 | (initrd_pstart < (addr + size))) { | |
117 | add_memory_region(addr, | |
70342287 RB |
118 | initrd_pstart - addr, |
119 | BOOT_MEM_RAM); | |
1da177e4 LT |
120 | rd_flag = 1; |
121 | } | |
122 | if ((initrd_pend > addr) && | |
123 | (initrd_pend < (addr + size))) { | |
124 | add_memory_region(initrd_pend, | |
125 | (addr + size) - initrd_pend, | |
126 | BOOT_MEM_RAM); | |
127 | rd_flag = 1; | |
128 | } | |
129 | } | |
130 | #endif | |
131 | if (!rd_flag) { | |
132 | if (addr > MAX_RAM_SIZE) | |
133 | continue; | |
134 | if (addr+size > MAX_RAM_SIZE) | |
135 | size = MAX_RAM_SIZE - (addr+size) + 1; | |
136 | /* | |
137 | * memcpy/__copy_user prefetch, which | |
138 | * will cause a bus error for | |
139 | * KSEG/KUSEG addrs not backed by RAM. | |
140 | * Hence, reserve some padding for the | |
141 | * prefetch distance. | |
142 | */ | |
143 | if (size > 512) | |
144 | size -= 512; | |
145 | add_memory_region(addr, size, BOOT_MEM_RAM); | |
146 | } | |
147 | board_mem_region_addrs[board_mem_region_count] = addr; | |
148 | board_mem_region_sizes[board_mem_region_count] = size; | |
149 | board_mem_region_count++; | |
150 | if (board_mem_region_count == | |
151 | SIBYTE_MAX_MEM_REGIONS) { | |
152 | /* | |
153 | * Too many regions. Need to configure more | |
154 | */ | |
155 | while(1); | |
156 | } | |
157 | } | |
158 | } | |
159 | #ifdef CONFIG_BLK_DEV_INITRD | |
160 | if (initrd_start) { | |
161 | add_memory_region(initrd_pstart, initrd_pend - initrd_pstart, | |
162 | BOOT_MEM_RESERVED); | |
163 | } | |
164 | #endif | |
165 | } | |
166 | ||
167 | #ifdef CONFIG_BLK_DEV_INITRD | |
168 | static int __init initrd_setup(char *str) | |
169 | { | |
170 | char rdarg[64]; | |
171 | int idx; | |
172 | char *tmp, *endptr; | |
173 | unsigned long initrd_size; | |
174 | ||
175 | /* Make a copy of the initrd argument so we can smash it up here */ | |
176 | for (idx = 0; idx < sizeof(rdarg)-1; idx++) { | |
177 | if (!str[idx] || (str[idx] == ' ')) break; | |
178 | rdarg[idx] = str[idx]; | |
179 | } | |
180 | ||
181 | rdarg[idx] = 0; | |
182 | str = rdarg; | |
183 | ||
184 | /* | |
185 | *Initrd location comes in the form "<hex size of ramdisk in bytes>@<location in memory>" | |
70342287 | 186 | * e.g. initrd=3abfd@80010000. This is set up by the loader. |
1da177e4 LT |
187 | */ |
188 | for (tmp = str; *tmp != '@'; tmp++) { | |
189 | if (!*tmp) { | |
190 | goto fail; | |
191 | } | |
192 | } | |
193 | *tmp = 0; | |
194 | tmp++; | |
195 | if (!*tmp) { | |
196 | goto fail; | |
197 | } | |
198 | initrd_size = simple_strtoul(str, &endptr, 16); | |
199 | if (*endptr) { | |
200 | *(tmp-1) = '@'; | |
201 | goto fail; | |
202 | } | |
203 | *(tmp-1) = '@'; | |
204 | initrd_start = simple_strtoul(tmp, &endptr, 16); | |
205 | if (*endptr) { | |
206 | goto fail; | |
207 | } | |
208 | initrd_end = initrd_start + initrd_size; | |
36a88530 | 209 | printk("Found initrd of %lx@%lx\n", initrd_size, initrd_start); |
1da177e4 LT |
210 | return 1; |
211 | fail: | |
36a88530 | 212 | printk("Bad initrd argument. Disabling initrd\n"); |
1da177e4 LT |
213 | initrd_start = 0; |
214 | initrd_end = 0; | |
215 | return 1; | |
216 | } | |
217 | ||
218 | #endif | |
219 | ||
ff2c8252 MR |
220 | extern const struct plat_smp_ops sb_smp_ops; |
221 | extern const struct plat_smp_ops bcm1480_smp_ops; | |
87353d8a | 222 | |
1da177e4 LT |
223 | /* |
224 | * prom_init is called just after the cpu type is determined, from setup_arch() | |
225 | */ | |
226 | void __init prom_init(void) | |
227 | { | |
228 | uint64_t cfe_ept, cfe_handle; | |
229 | unsigned int cfe_eptseal; | |
230 | int argc = fw_arg0; | |
231 | char **envp = (char **) fw_arg2; | |
232 | int *prom_vec = (int *) fw_arg3; | |
1da177e4 LT |
233 | |
234 | _machine_restart = cfe_linux_restart; | |
70342287 | 235 | _machine_halt = cfe_linux_halt; |
fcdb27ad | 236 | pm_power_off = cfe_linux_halt; |
1da177e4 LT |
237 | |
238 | /* | |
239 | * Check if a loader was used; if NOT, the 4 arguments are | |
240 | * what CFE gives us (handle, 0, EPT and EPTSEAL) | |
241 | */ | |
242 | if (argc < 0) { | |
243 | cfe_handle = (uint64_t)(long)argc; | |
244 | cfe_ept = (long)envp; | |
245 | cfe_eptseal = (uint32_t)(unsigned long)prom_vec; | |
246 | } else { | |
247 | if ((int32_t)(long)prom_vec < 0) { | |
248 | /* | |
249 | * Old loader; all it gives us is the handle, | |
250 | * so use the "known" entrypoint and assume | |
251 | * the seal. | |
252 | */ | |
253 | cfe_handle = (uint64_t)(long)prom_vec; | |
254 | cfe_ept = (uint64_t)((int32_t)0x9fc00500); | |
255 | cfe_eptseal = CFE_EPTSEAL; | |
256 | } else { | |
257 | /* | |
258 | * Newer loaders bundle the handle/ept/eptseal | |
259 | * Note: prom_vec is in the loader's useg | |
260 | * which is still alive in the TLB. | |
261 | */ | |
262 | cfe_handle = (uint64_t)((int32_t *)prom_vec)[0]; | |
263 | cfe_ept = (uint64_t)((int32_t *)prom_vec)[2]; | |
264 | cfe_eptseal = (unsigned int)((uint32_t *)prom_vec)[3]; | |
265 | } | |
266 | } | |
267 | if (cfe_eptseal != CFE_EPTSEAL) { | |
268 | /* too early for panic to do any good */ | |
36a88530 | 269 | printk("CFE's entrypoint seal doesn't match. Spinning."); |
1da177e4 LT |
270 | while (1) ; |
271 | } | |
272 | cfe_init(cfe_handle, cfe_ept); | |
42a3b4f2 | 273 | /* |
1da177e4 LT |
274 | * Get the handle for (at least) prom_putchar, possibly for |
275 | * boot console | |
276 | */ | |
277 | cfe_cons_handle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE); | |
7580c9c3 | 278 | if (cfe_getenv("LINUX_CMDLINE", arcs_cmdline, COMMAND_LINE_SIZE) < 0) { |
e082f188 | 279 | if (argc >= 0) { |
1da177e4 LT |
280 | /* The loader should have set the command line */ |
281 | /* too early for panic to do any good */ | |
36a88530 | 282 | printk("LINUX_CMDLINE not defined in cfe."); |
1da177e4 LT |
283 | while (1) ; |
284 | } | |
285 | } | |
286 | ||
1da177e4 LT |
287 | #ifdef CONFIG_BLK_DEV_INITRD |
288 | { | |
289 | char *ptr; | |
70342287 | 290 | /* Need to find out early whether we've got an initrd. So scan |
1da177e4 LT |
291 | the list looking now */ |
292 | for (ptr = arcs_cmdline; *ptr; ptr++) { | |
293 | while (*ptr == ' ') { | |
294 | ptr++; | |
295 | } | |
296 | if (!strncmp(ptr, "initrd=", 7)) { | |
297 | initrd_setup(ptr+7); | |
298 | break; | |
299 | } else { | |
300 | while (*ptr && (*ptr != ' ')) { | |
301 | ptr++; | |
302 | } | |
303 | } | |
304 | } | |
305 | } | |
306 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
307 | ||
308 | /* Not sure this is needed, but it's the safe way. */ | |
7580c9c3 | 309 | arcs_cmdline[COMMAND_LINE_SIZE-1] = 0; |
1da177e4 | 310 | |
1da177e4 | 311 | prom_meminit(); |
87353d8a RB |
312 | |
313 | #if defined(CONFIG_SIBYTE_BCM112X) || defined(CONFIG_SIBYTE_SB1250) | |
314 | register_smp_ops(&sb_smp_ops); | |
315 | #endif | |
316 | #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80) | |
317 | register_smp_ops(&bcm1480_smp_ops); | |
318 | #endif | |
1da177e4 LT |
319 | } |
320 | ||
c44e8d5e | 321 | void __init prom_free_prom_memory(void) |
1da177e4 LT |
322 | { |
323 | /* Not sure what I'm supposed to do here. Nothing, I think */ | |
1da177e4 LT |
324 | } |
325 | ||
326 | void prom_putchar(char c) | |
327 | { | |
328 | int ret; | |
329 | ||
330 | while ((ret = cfe_write(cfe_cons_handle, &c, 1)) == 0) | |
331 | ; | |
332 | } |