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 unsigned int mips_revision_corid;
62 /* Bonito64 system controller register base. */
63 unsigned long _pcictrl_bonito;
64 unsigned long _pcictrl_bonito_pcicfg;
66 /* GT64120 system controller register base */
67 unsigned long _pcictrl_gt64120;
69 /* MIPS System controller register base */
70 unsigned long _pcictrl_msc;
72 char *prom_getenv(char *envname)
75 * Return a pointer to the given environment variable.
76 * In 64-bit mode: we're using 64-bit pointers, but all pointers
77 * in the PROM structures are only 32-bit, so we need some
78 * workarounds, if we are running in 64-bit mode.
84 while (prom_envp(index)) {
85 if(strncmp(envname, prom_envp(index), i) == 0) {
86 return(prom_envp(index+1));
94 static inline unsigned char str2hexnum(unsigned char c)
96 if (c >= '0' && c <= '9')
98 if (c >= 'a' && c <= 'f')
103 static inline void str2eaddr(unsigned char *ea, unsigned char *str)
107 for (i = 0; i < 6; i++) {
110 if((*str == '.') || (*str == ':'))
112 num = str2hexnum(*str++) << 4;
113 num |= (str2hexnum(*str++));
118 int get_ethernet_addr(char *ethernet_addr)
122 ethaddr_str = prom_getenv("ethaddr");
124 printk("ethaddr not set in boot prom\n");
127 str2eaddr(ethernet_addr, ethaddr_str);
129 if (init_debug > 1) {
131 printk("get_ethernet_addr: ");
133 printk("%02x:", (unsigned char)*(ethernet_addr+i));
134 printk("%02x\n", *(ethernet_addr+i));
140 #ifdef CONFIG_SERIAL_8250_CONSOLE
141 static void __init console_config(void)
143 char console_string[40];
145 char parity = '\0', bits = '\0', flow = '\0';
148 if ((strstr(prom_getcmdline(), "console=ttyS")) == NULL) {
149 s = prom_getenv("modetty0");
151 while (*s >= '0' && *s <= '9')
152 baud = baud*10 + *s++ - '0';
154 if (*s) parity = *s++;
158 if (*s == 'h') flow = 'r';
162 if (parity != 'n' && parity != 'o' && parity != 'e')
164 if (bits != '7' && bits != '8')
168 sprintf (console_string, " console=ttyS0,%d%c%c%c", baud, parity, bits, flow);
169 strcat (prom_getcmdline(), console_string);
170 prom_printf("Config serial console:%s\n", console_string);
176 void __init kgdb_config (void)
178 extern int (*generic_putDebugChar)(char);
179 extern char (*generic_getDebugChar)(void);
183 argptr = prom_getcmdline();
184 if ((argptr = strstr(argptr, "kgdb=ttyS")) != NULL) {
185 argptr += strlen("kgdb=ttyS");
186 if (*argptr != '0' && *argptr != '1')
187 printk("KGDB: Unknown serial line /dev/ttyS%c, "
188 "falling back to /dev/ttyS1\n", *argptr);
189 line = *argptr == '0' ? 0 : 1;
190 printk("KGDB: Using serial line /dev/ttyS%d for session\n", line);
193 if (*++argptr == ',')
196 while ((c = *++argptr) && ('0' <= c && c <= '9'))
197 speed = speed * 10 + c - '0';
199 #ifdef CONFIG_MIPS_ATLAS
201 speed = saa9730_kgdb_hook(speed);
202 generic_putDebugChar = saa9730_putDebugChar;
203 generic_getDebugChar = saa9730_getDebugChar;
208 speed = rs_kgdb_hook(line, speed);
209 generic_putDebugChar = rs_putDebugChar;
210 generic_getDebugChar = rs_getDebugChar;
213 prom_printf("KGDB: Using serial line /dev/ttyS%d at %d for session, "
214 "please connect your debugger\n", line ? 1 : 0, speed);
218 for (s = "Please connect GDB to this port\r\n"; *s; )
219 generic_putDebugChar (*s++);
222 /* Breakpoint is invoked after interrupts are initialised */
227 void __init mips_nmi_setup (void)
230 extern char except_vec_nmi;
232 base = cpu_has_veic ?
233 (void *)(CAC_BASE + 0xa80) :
234 (void *)(CAC_BASE + 0x380);
235 memcpy(base, &except_vec_nmi, 0x80);
236 flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
239 void __init mips_ejtag_setup (void)
242 extern char except_vec_ejtag_debug;
244 base = cpu_has_veic ?
245 (void *)(CAC_BASE + 0xa00) :
246 (void *)(CAC_BASE + 0x300);
247 memcpy(base, &except_vec_ejtag_debug, 0x80);
248 flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
251 void __init prom_init(void)
253 u32 start, map, mask, data;
256 _prom_argv = (int *) fw_arg1;
257 _prom_envp = (int *) fw_arg2;
259 mips_display_message("LINUX");
261 #ifdef CONFIG_MIPS_SEAD
262 set_io_port_base(KSEG1);
265 * early setup of _pcictrl_bonito so that we can determine
266 * the system controller on a CORE_EMUL board
268 _pcictrl_bonito = (unsigned long)ioremap(BONITO_REG_BASE, BONITO_REG_SIZE);
270 mips_revision_corid = MIPS_REVISION_CORID;
272 if (mips_revision_corid == MIPS_REVISION_CORID_CORE_EMUL) {
273 if (BONITO_PCIDID == 0x0001df53 ||
274 BONITO_PCIDID == 0x0003df53)
275 mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_BON;
277 mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_MSC;
279 switch(mips_revision_corid) {
280 case MIPS_REVISION_CORID_QED_RM5261:
281 case MIPS_REVISION_CORID_CORE_LV:
282 case MIPS_REVISION_CORID_CORE_FPGA:
283 case MIPS_REVISION_CORID_CORE_FPGAR2:
285 * Setup the North bridge to do Master byte-lane swapping
286 * when running in bigendian.
288 _pcictrl_gt64120 = (unsigned long)ioremap(MIPS_GT_BASE, 0x2000);
290 #ifdef CONFIG_CPU_LITTLE_ENDIAN
291 GT_WRITE(GT_PCI0_CMD_OFS, GT_PCI0_CMD_MBYTESWAP_BIT |
292 GT_PCI0_CMD_SBYTESWAP_BIT);
294 GT_WRITE(GT_PCI0_CMD_OFS, 0);
296 /* Fix up PCI I/O mapping if necessary (for Atlas). */
297 start = GT_READ(GT_PCI0IOLD_OFS);
298 map = GT_READ(GT_PCI0IOREMAP_OFS);
299 if ((start & map) != 0) {
301 GT_WRITE(GT_PCI0IOREMAP_OFS, map);
304 set_io_port_base(MALTA_GT_PORT_BASE);
307 case MIPS_REVISION_CORID_CORE_EMUL_BON:
308 case MIPS_REVISION_CORID_BONITO64:
309 case MIPS_REVISION_CORID_CORE_20K:
310 _pcictrl_bonito_pcicfg = (unsigned long)ioremap(BONITO_PCICFG_BASE, BONITO_PCICFG_SIZE);
313 * Disable Bonito IOBC.
315 BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
316 ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
317 BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
320 * Setup the North bridge to do Master byte-lane swapping
321 * when running in bigendian.
323 #ifdef CONFIG_CPU_LITTLE_ENDIAN
324 BONITO_BONGENCFG = BONITO_BONGENCFG &
325 ~(BONITO_BONGENCFG_MSTRBYTESWAP |
326 BONITO_BONGENCFG_BYTESWAP);
328 BONITO_BONGENCFG = BONITO_BONGENCFG |
329 BONITO_BONGENCFG_MSTRBYTESWAP |
330 BONITO_BONGENCFG_BYTESWAP;
333 set_io_port_base(MALTA_BONITO_PORT_BASE);
336 case MIPS_REVISION_CORID_CORE_MSC:
337 case MIPS_REVISION_CORID_CORE_FPGA2:
338 case MIPS_REVISION_CORID_CORE_FPGA3:
339 case MIPS_REVISION_CORID_CORE_24K:
340 case MIPS_REVISION_CORID_CORE_EMUL_MSC:
341 _pcictrl_msc = (unsigned long)ioremap(MIPS_MSC01_PCI_REG_BASE, 0x2000);
344 MSC_READ(MSC01_PCI_CFG, data);
345 MSC_WRITE(MSC01_PCI_CFG, data & ~MSC01_PCI_CFG_EN_BIT);
348 /* Fix up lane swapping. */
349 #ifdef CONFIG_CPU_LITTLE_ENDIAN
350 MSC_WRITE(MSC01_PCI_SWAP, MSC01_PCI_SWAP_NOSWAP);
352 MSC_WRITE(MSC01_PCI_SWAP,
353 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_IO_SHF |
354 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_MEM_SHF |
355 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_BAR0_SHF);
357 /* Fix up target memory mapping. */
358 MSC_READ(MSC01_PCI_BAR0, mask);
359 MSC_WRITE(MSC01_PCI_P2SCMSKL, mask & MSC01_PCI_BAR0_SIZE_MSK);
361 /* Don't handle target retries indefinitely. */
362 if ((data & MSC01_PCI_CFG_MAXRTRY_MSK) ==
363 MSC01_PCI_CFG_MAXRTRY_MSK)
364 data = (data & ~(MSC01_PCI_CFG_MAXRTRY_MSK <<
365 MSC01_PCI_CFG_MAXRTRY_SHF)) |
366 ((MSC01_PCI_CFG_MAXRTRY_MSK - 1) <<
367 MSC01_PCI_CFG_MAXRTRY_SHF);
370 MSC_WRITE(MSC01_PCI_CFG, data);
373 set_io_port_base(MALTA_MSC_PORT_BASE);
377 /* Unknown Core card */
378 mips_display_message("CC Error");
379 while(1); /* We die here... */
382 board_nmi_handler_setup = mips_nmi_setup;
383 board_ejtag_handler_setup = mips_ejtag_setup;
385 prom_printf("\nLINUX started...\n");
388 #ifdef CONFIG_SERIAL_8250_CONSOLE