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 extern int rs_kgdb_hook(int, int);
42 extern int rs_putDebugChar(char);
43 extern char rs_getDebugChar(void);
44 extern int saa9730_kgdb_hook(int);
45 extern int saa9730_putDebugChar(char);
46 extern char saa9730_getDebugChar(void);
50 int *_prom_argv, *_prom_envp;
53 * YAMON (32-bit PROM) pass arguments and environment as 32-bit pointer.
54 * This macro take care of sign extension, if running in 64-bit mode.
56 #define prom_envp(index) ((char *)(long)_prom_envp[(index)])
60 int mips_revision_corid;
61 int mips_revision_sconid;
63 /* Bonito64 system controller register base. */
64 unsigned long _pcictrl_bonito;
65 unsigned long _pcictrl_bonito_pcicfg;
67 /* GT64120 system controller register base */
68 unsigned long _pcictrl_gt64120;
70 /* MIPS System controller register base */
71 unsigned long _pcictrl_msc;
73 char *prom_getenv(char *envname)
76 * Return a pointer to the given environment variable.
77 * In 64-bit mode: we're using 64-bit pointers, but all pointers
78 * in the PROM structures are only 32-bit, so we need some
79 * workarounds, if we are running in 64-bit mode.
85 while (prom_envp(index)) {
86 if(strncmp(envname, prom_envp(index), i) == 0) {
87 return(prom_envp(index+1));
95 static inline unsigned char str2hexnum(unsigned char c)
97 if (c >= '0' && c <= '9')
99 if (c >= 'a' && c <= 'f')
104 static inline void str2eaddr(unsigned char *ea, unsigned char *str)
108 for (i = 0; i < 6; i++) {
111 if((*str == '.') || (*str == ':'))
113 num = str2hexnum(*str++) << 4;
114 num |= (str2hexnum(*str++));
119 int get_ethernet_addr(char *ethernet_addr)
123 ethaddr_str = prom_getenv("ethaddr");
125 printk("ethaddr not set in boot prom\n");
128 str2eaddr(ethernet_addr, ethaddr_str);
130 if (init_debug > 1) {
132 printk("get_ethernet_addr: ");
134 printk("%02x:", (unsigned char)*(ethernet_addr+i));
135 printk("%02x\n", *(ethernet_addr+i));
141 #ifdef CONFIG_SERIAL_8250_CONSOLE
142 static void __init console_config(void)
144 char console_string[40];
146 char parity = '\0', bits = '\0', flow = '\0';
149 if ((strstr(prom_getcmdline(), "console=")) == NULL) {
150 s = prom_getenv("modetty0");
152 while (*s >= '0' && *s <= '9')
153 baud = baud*10 + *s++ - '0';
155 if (*s) parity = *s++;
159 if (*s == 'h') flow = 'r';
163 if (parity != 'n' && parity != 'o' && parity != 'e')
165 if (bits != '7' && bits != '8')
169 sprintf(console_string, " console=ttyS0,%d%c%c%c", baud, parity, bits, flow);
170 strcat(prom_getcmdline(), console_string);
171 pr_info("Config serial console:%s\n", console_string);
177 void __init kgdb_config(void)
179 extern int (*generic_putDebugChar)(char);
180 extern char (*generic_getDebugChar)(void);
184 argptr = prom_getcmdline();
185 if ((argptr = strstr(argptr, "kgdb=ttyS")) != NULL) {
186 argptr += strlen("kgdb=ttyS");
187 if (*argptr != '0' && *argptr != '1')
188 printk("KGDB: Unknown serial line /dev/ttyS%c, "
189 "falling back to /dev/ttyS1\n", *argptr);
190 line = *argptr == '0' ? 0 : 1;
191 printk("KGDB: Using serial line /dev/ttyS%d for session\n", line);
194 if (*++argptr == ',')
197 while ((c = *++argptr) && ('0' <= c && c <= '9'))
198 speed = speed * 10 + c - '0';
201 speed = rs_kgdb_hook(line, speed);
202 generic_putDebugChar = rs_putDebugChar;
203 generic_getDebugChar = rs_getDebugChar;
206 pr_info("KGDB: Using serial line /dev/ttyS%d at %d for "
207 "session, please connect your debugger\n",
208 line ? 1 : 0, speed);
212 for (s = "Please connect GDB to this port\r\n"; *s; )
213 generic_putDebugChar(*s++);
216 /* Breakpoint is invoked after interrupts are initialised */
221 static void __init mips_nmi_setup(void)
224 extern char except_vec_nmi;
226 base = cpu_has_veic ?
227 (void *)(CAC_BASE + 0xa80) :
228 (void *)(CAC_BASE + 0x380);
229 memcpy(base, &except_vec_nmi, 0x80);
230 flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
233 static void __init mips_ejtag_setup(void)
236 extern char except_vec_ejtag_debug;
238 base = cpu_has_veic ?
239 (void *)(CAC_BASE + 0xa00) :
240 (void *)(CAC_BASE + 0x300);
241 memcpy(base, &except_vec_ejtag_debug, 0x80);
242 flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
245 extern struct plat_smp_ops msmtc_smp_ops;
247 void __init prom_init(void)
250 _prom_argv = (int *) fw_arg1;
251 _prom_envp = (int *) fw_arg2;
253 mips_display_message("LINUX");
256 * early setup of _pcictrl_bonito so that we can determine
257 * the system controller on a CORE_EMUL board
259 _pcictrl_bonito = (unsigned long)ioremap(BONITO_REG_BASE, BONITO_REG_SIZE);
261 mips_revision_corid = MIPS_REVISION_CORID;
263 if (mips_revision_corid == MIPS_REVISION_CORID_CORE_EMUL) {
264 if (BONITO_PCIDID == 0x0001df53 ||
265 BONITO_PCIDID == 0x0003df53)
266 mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_BON;
268 mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_MSC;
271 mips_revision_sconid = MIPS_REVISION_SCONID;
272 if (mips_revision_sconid == MIPS_REVISION_SCON_OTHER) {
273 switch (mips_revision_corid) {
274 case MIPS_REVISION_CORID_QED_RM5261:
275 case MIPS_REVISION_CORID_CORE_LV:
276 case MIPS_REVISION_CORID_CORE_FPGA:
277 case MIPS_REVISION_CORID_CORE_FPGAR2:
278 mips_revision_sconid = MIPS_REVISION_SCON_GT64120;
280 case MIPS_REVISION_CORID_CORE_EMUL_BON:
281 case MIPS_REVISION_CORID_BONITO64:
282 case MIPS_REVISION_CORID_CORE_20K:
283 mips_revision_sconid = MIPS_REVISION_SCON_BONITO;
285 case MIPS_REVISION_CORID_CORE_MSC:
286 case MIPS_REVISION_CORID_CORE_FPGA2:
287 case MIPS_REVISION_CORID_CORE_24K:
289 * SOCit/ROCit support is essentially identical
290 * but make an attempt to distinguish them
292 mips_revision_sconid = MIPS_REVISION_SCON_SOCIT;
294 case MIPS_REVISION_CORID_CORE_FPGA3:
295 case MIPS_REVISION_CORID_CORE_FPGA4:
296 case MIPS_REVISION_CORID_CORE_FPGA5:
297 case MIPS_REVISION_CORID_CORE_EMUL_MSC:
300 mips_revision_sconid = MIPS_REVISION_SCON_ROCIT;
305 switch (mips_revision_sconid) {
306 u32 start, map, mask, data;
308 case MIPS_REVISION_SCON_GT64120:
310 * Setup the North bridge to do Master byte-lane swapping
311 * when running in bigendian.
313 _pcictrl_gt64120 = (unsigned long)ioremap(MIPS_GT_BASE, 0x2000);
315 #ifdef CONFIG_CPU_LITTLE_ENDIAN
316 GT_WRITE(GT_PCI0_CMD_OFS, GT_PCI0_CMD_MBYTESWAP_BIT |
317 GT_PCI0_CMD_SBYTESWAP_BIT);
319 GT_WRITE(GT_PCI0_CMD_OFS, 0);
321 /* Fix up PCI I/O mapping if necessary (for Atlas). */
322 start = GT_READ(GT_PCI0IOLD_OFS);
323 map = GT_READ(GT_PCI0IOREMAP_OFS);
324 if ((start & map) != 0) {
326 GT_WRITE(GT_PCI0IOREMAP_OFS, map);
329 set_io_port_base(MALTA_GT_PORT_BASE);
332 case MIPS_REVISION_SCON_BONITO:
333 _pcictrl_bonito_pcicfg = (unsigned long)ioremap(BONITO_PCICFG_BASE, BONITO_PCICFG_SIZE);
336 * Disable Bonito IOBC.
338 BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
339 ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
340 BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
343 * Setup the North bridge to do Master byte-lane swapping
344 * when running in bigendian.
346 #ifdef CONFIG_CPU_LITTLE_ENDIAN
347 BONITO_BONGENCFG = BONITO_BONGENCFG &
348 ~(BONITO_BONGENCFG_MSTRBYTESWAP |
349 BONITO_BONGENCFG_BYTESWAP);
351 BONITO_BONGENCFG = BONITO_BONGENCFG |
352 BONITO_BONGENCFG_MSTRBYTESWAP |
353 BONITO_BONGENCFG_BYTESWAP;
356 set_io_port_base(MALTA_BONITO_PORT_BASE);
359 case MIPS_REVISION_SCON_SOCIT:
360 case MIPS_REVISION_SCON_ROCIT:
361 _pcictrl_msc = (unsigned long)ioremap(MIPS_MSC01_PCI_REG_BASE, 0x2000);
364 MSC_READ(MSC01_PCI_CFG, data);
365 MSC_WRITE(MSC01_PCI_CFG, data & ~MSC01_PCI_CFG_EN_BIT);
368 /* Fix up lane swapping. */
369 #ifdef CONFIG_CPU_LITTLE_ENDIAN
370 MSC_WRITE(MSC01_PCI_SWAP, MSC01_PCI_SWAP_NOSWAP);
372 MSC_WRITE(MSC01_PCI_SWAP,
373 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_IO_SHF |
374 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_MEM_SHF |
375 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_BAR0_SHF);
377 /* Fix up target memory mapping. */
378 MSC_READ(MSC01_PCI_BAR0, mask);
379 MSC_WRITE(MSC01_PCI_P2SCMSKL, mask & MSC01_PCI_BAR0_SIZE_MSK);
381 /* Don't handle target retries indefinitely. */
382 if ((data & MSC01_PCI_CFG_MAXRTRY_MSK) ==
383 MSC01_PCI_CFG_MAXRTRY_MSK)
384 data = (data & ~(MSC01_PCI_CFG_MAXRTRY_MSK <<
385 MSC01_PCI_CFG_MAXRTRY_SHF)) |
386 ((MSC01_PCI_CFG_MAXRTRY_MSK - 1) <<
387 MSC01_PCI_CFG_MAXRTRY_SHF);
390 MSC_WRITE(MSC01_PCI_CFG, data);
393 set_io_port_base(MALTA_MSC_PORT_BASE);
396 case MIPS_REVISION_SCON_SOCITSC:
397 case MIPS_REVISION_SCON_SOCITSCP:
398 _pcictrl_msc = (unsigned long)ioremap(MIPS_SOCITSC_PCI_REG_BASE, 0x2000);
399 goto mips_pci_controller;
402 /* Unknown system controller */
403 mips_display_message("SC Error");
404 while (1); /* We die here... */
406 board_nmi_handler_setup = mips_nmi_setup;
407 board_ejtag_handler_setup = mips_ejtag_setup;
409 pr_info("\nLINUX started...\n");
412 #ifdef CONFIG_SERIAL_8250_CONSOLE
415 #ifdef CONFIG_MIPS_CMP
416 register_smp_ops(&cmp_smp_ops);
418 #ifdef CONFIG_MIPS_MT_SMP
419 register_smp_ops(&vsmp_smp_ops);
421 #ifdef CONFIG_MIPS_MT_SMTC
422 register_smp_ops(&msmtc_smp_ops);