2 * Copyright (C) 1999, 2000, 2004, 2005 MIPS Technologies, Inc.
4 * Authors: Carsten Langgaard <carstenl@mips.com>
5 * Maciej W. Rozycki <macro@mips.com>
7 * This program is free software; you can distribute it and/or modify it
8 * under the terms of the GNU General Public License (Version 2) as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
20 * PROM library initialisation code.
22 #include <linux/init.h>
23 #include <linux/string.h>
24 #include <linux/kernel.h>
26 #include <asm/bootinfo.h>
27 #include <asm/gt64120.h>
29 #include <asm/system.h>
30 #include <asm/cacheflush.h>
31 #include <asm/traps.h>
33 #include <asm/mips-boards/prom.h>
34 #include <asm/mips-boards/generic.h>
35 #include <asm/mips-boards/bonito64.h>
36 #include <asm/mips-boards/msc01_pci.h>
38 #include <asm/mips-boards/malta.h>
41 int *_prom_argv, *_prom_envp;
44 * YAMON (32-bit PROM) pass arguments and environment as 32-bit pointer.
45 * This macro take care of sign extension, if running in 64-bit mode.
47 #define prom_envp(index) ((char *)(long)_prom_envp[(index)])
51 int mips_revision_corid;
52 int mips_revision_sconid;
54 /* Bonito64 system controller register base. */
55 unsigned long _pcictrl_bonito;
56 unsigned long _pcictrl_bonito_pcicfg;
58 /* GT64120 system controller register base */
59 unsigned long _pcictrl_gt64120;
61 /* MIPS System controller register base */
62 unsigned long _pcictrl_msc;
64 char *prom_getenv(char *envname)
67 * Return a pointer to the given environment variable.
68 * In 64-bit mode: we're using 64-bit pointers, but all pointers
69 * in the PROM structures are only 32-bit, so we need some
70 * workarounds, if we are running in 64-bit mode.
76 while (prom_envp(index)) {
77 if(strncmp(envname, prom_envp(index), i) == 0) {
78 return(prom_envp(index+1));
86 static inline unsigned char str2hexnum(unsigned char c)
88 if (c >= '0' && c <= '9')
90 if (c >= 'a' && c <= 'f')
95 static inline void str2eaddr(unsigned char *ea, unsigned char *str)
99 for (i = 0; i < 6; i++) {
102 if((*str == '.') || (*str == ':'))
104 num = str2hexnum(*str++) << 4;
105 num |= (str2hexnum(*str++));
110 int get_ethernet_addr(char *ethernet_addr)
114 ethaddr_str = prom_getenv("ethaddr");
116 printk("ethaddr not set in boot prom\n");
119 str2eaddr(ethernet_addr, ethaddr_str);
121 if (init_debug > 1) {
123 printk("get_ethernet_addr: ");
125 printk("%02x:", (unsigned char)*(ethernet_addr+i));
126 printk("%02x\n", *(ethernet_addr+i));
132 #ifdef CONFIG_SERIAL_8250_CONSOLE
133 static void __init console_config(void)
135 char console_string[40];
137 char parity = '\0', bits = '\0', flow = '\0';
140 if ((strstr(prom_getcmdline(), "console=")) == NULL) {
141 s = prom_getenv("modetty0");
143 while (*s >= '0' && *s <= '9')
144 baud = baud*10 + *s++ - '0';
146 if (*s) parity = *s++;
150 if (*s == 'h') flow = 'r';
154 if (parity != 'n' && parity != 'o' && parity != 'e')
156 if (bits != '7' && bits != '8')
160 sprintf(console_string, " console=ttyS0,%d%c%c%c", baud, parity, bits, flow);
161 strcat(prom_getcmdline(), console_string);
162 pr_info("Config serial console:%s\n", console_string);
167 static void __init mips_nmi_setup(void)
170 extern char except_vec_nmi;
172 base = cpu_has_veic ?
173 (void *)(CAC_BASE + 0xa80) :
174 (void *)(CAC_BASE + 0x380);
175 memcpy(base, &except_vec_nmi, 0x80);
176 flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
179 static void __init mips_ejtag_setup(void)
182 extern char except_vec_ejtag_debug;
184 base = cpu_has_veic ?
185 (void *)(CAC_BASE + 0xa00) :
186 (void *)(CAC_BASE + 0x300);
187 memcpy(base, &except_vec_ejtag_debug, 0x80);
188 flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
191 extern struct plat_smp_ops msmtc_smp_ops;
193 void __init prom_init(void)
196 _prom_argv = (int *) fw_arg1;
197 _prom_envp = (int *) fw_arg2;
199 mips_display_message("LINUX");
202 * early setup of _pcictrl_bonito so that we can determine
203 * the system controller on a CORE_EMUL board
205 _pcictrl_bonito = (unsigned long)ioremap(BONITO_REG_BASE, BONITO_REG_SIZE);
207 mips_revision_corid = MIPS_REVISION_CORID;
209 if (mips_revision_corid == MIPS_REVISION_CORID_CORE_EMUL) {
210 if (BONITO_PCIDID == 0x0001df53 ||
211 BONITO_PCIDID == 0x0003df53)
212 mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_BON;
214 mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_MSC;
217 mips_revision_sconid = MIPS_REVISION_SCONID;
218 if (mips_revision_sconid == MIPS_REVISION_SCON_OTHER) {
219 switch (mips_revision_corid) {
220 case MIPS_REVISION_CORID_QED_RM5261:
221 case MIPS_REVISION_CORID_CORE_LV:
222 case MIPS_REVISION_CORID_CORE_FPGA:
223 case MIPS_REVISION_CORID_CORE_FPGAR2:
224 mips_revision_sconid = MIPS_REVISION_SCON_GT64120;
226 case MIPS_REVISION_CORID_CORE_EMUL_BON:
227 case MIPS_REVISION_CORID_BONITO64:
228 case MIPS_REVISION_CORID_CORE_20K:
229 mips_revision_sconid = MIPS_REVISION_SCON_BONITO;
231 case MIPS_REVISION_CORID_CORE_MSC:
232 case MIPS_REVISION_CORID_CORE_FPGA2:
233 case MIPS_REVISION_CORID_CORE_24K:
235 * SOCit/ROCit support is essentially identical
236 * but make an attempt to distinguish them
238 mips_revision_sconid = MIPS_REVISION_SCON_SOCIT;
240 case MIPS_REVISION_CORID_CORE_FPGA3:
241 case MIPS_REVISION_CORID_CORE_FPGA4:
242 case MIPS_REVISION_CORID_CORE_FPGA5:
243 case MIPS_REVISION_CORID_CORE_EMUL_MSC:
246 mips_revision_sconid = MIPS_REVISION_SCON_ROCIT;
251 switch (mips_revision_sconid) {
252 u32 start, map, mask, data;
254 case MIPS_REVISION_SCON_GT64120:
256 * Setup the North bridge to do Master byte-lane swapping
257 * when running in bigendian.
259 _pcictrl_gt64120 = (unsigned long)ioremap(MIPS_GT_BASE, 0x2000);
261 #ifdef CONFIG_CPU_LITTLE_ENDIAN
262 GT_WRITE(GT_PCI0_CMD_OFS, GT_PCI0_CMD_MBYTESWAP_BIT |
263 GT_PCI0_CMD_SBYTESWAP_BIT);
265 GT_WRITE(GT_PCI0_CMD_OFS, 0);
267 /* Fix up PCI I/O mapping if necessary (for Atlas). */
268 start = GT_READ(GT_PCI0IOLD_OFS);
269 map = GT_READ(GT_PCI0IOREMAP_OFS);
270 if ((start & map) != 0) {
272 GT_WRITE(GT_PCI0IOREMAP_OFS, map);
275 set_io_port_base(MALTA_GT_PORT_BASE);
278 case MIPS_REVISION_SCON_BONITO:
279 _pcictrl_bonito_pcicfg = (unsigned long)ioremap(BONITO_PCICFG_BASE, BONITO_PCICFG_SIZE);
282 * Disable Bonito IOBC.
284 BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
285 ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
286 BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
289 * Setup the North bridge to do Master byte-lane swapping
290 * when running in bigendian.
292 #ifdef CONFIG_CPU_LITTLE_ENDIAN
293 BONITO_BONGENCFG = BONITO_BONGENCFG &
294 ~(BONITO_BONGENCFG_MSTRBYTESWAP |
295 BONITO_BONGENCFG_BYTESWAP);
297 BONITO_BONGENCFG = BONITO_BONGENCFG |
298 BONITO_BONGENCFG_MSTRBYTESWAP |
299 BONITO_BONGENCFG_BYTESWAP;
302 set_io_port_base(MALTA_BONITO_PORT_BASE);
305 case MIPS_REVISION_SCON_SOCIT:
306 case MIPS_REVISION_SCON_ROCIT:
307 _pcictrl_msc = (unsigned long)ioremap(MIPS_MSC01_PCI_REG_BASE, 0x2000);
310 MSC_READ(MSC01_PCI_CFG, data);
311 MSC_WRITE(MSC01_PCI_CFG, data & ~MSC01_PCI_CFG_EN_BIT);
314 /* Fix up lane swapping. */
315 #ifdef CONFIG_CPU_LITTLE_ENDIAN
316 MSC_WRITE(MSC01_PCI_SWAP, MSC01_PCI_SWAP_NOSWAP);
318 MSC_WRITE(MSC01_PCI_SWAP,
319 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_IO_SHF |
320 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_MEM_SHF |
321 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_BAR0_SHF);
323 /* Fix up target memory mapping. */
324 MSC_READ(MSC01_PCI_BAR0, mask);
325 MSC_WRITE(MSC01_PCI_P2SCMSKL, mask & MSC01_PCI_BAR0_SIZE_MSK);
327 /* Don't handle target retries indefinitely. */
328 if ((data & MSC01_PCI_CFG_MAXRTRY_MSK) ==
329 MSC01_PCI_CFG_MAXRTRY_MSK)
330 data = (data & ~(MSC01_PCI_CFG_MAXRTRY_MSK <<
331 MSC01_PCI_CFG_MAXRTRY_SHF)) |
332 ((MSC01_PCI_CFG_MAXRTRY_MSK - 1) <<
333 MSC01_PCI_CFG_MAXRTRY_SHF);
336 MSC_WRITE(MSC01_PCI_CFG, data);
339 set_io_port_base(MALTA_MSC_PORT_BASE);
342 case MIPS_REVISION_SCON_SOCITSC:
343 case MIPS_REVISION_SCON_SOCITSCP:
344 _pcictrl_msc = (unsigned long)ioremap(MIPS_SOCITSC_PCI_REG_BASE, 0x2000);
345 goto mips_pci_controller;
348 /* Unknown system controller */
349 mips_display_message("SC Error");
350 while (1); /* We die here... */
352 board_nmi_handler_setup = mips_nmi_setup;
353 board_ejtag_handler_setup = mips_ejtag_setup;
355 pr_info("\nLINUX started...\n");
358 #ifdef CONFIG_SERIAL_8250_CONSOLE
361 #ifdef CONFIG_MIPS_CMP
362 register_smp_ops(&cmp_smp_ops);
364 #ifdef CONFIG_MIPS_MT_SMP
365 register_smp_ops(&vsmp_smp_ops);
367 #ifdef CONFIG_MIPS_MT_SMTC
368 register_smp_ops(&msmtc_smp_ops);