patch-2.4.22 linux-2.4.22/arch/mips/sibyte/sb1250/setup.c
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- Lines: 217
- Date:
2003-08-25 04:44:40.000000000 -0700
- Orig file:
linux-2.4.21/arch/mips/sibyte/sb1250/setup.c
- Orig date:
2002-11-28 15:53:10.000000000 -0800
diff -urN linux-2.4.21/arch/mips/sibyte/sb1250/setup.c linux-2.4.22/arch/mips/sibyte/sb1250/setup.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2000, 2001 Broadcom Corporation
+ * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -16,39 +16,195 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
+#include <linux/kernel.h>
+#include <linux/reboot.h>
+#include <linux/string.h>
+
+#include <asm/bootinfo.h>
+#include <asm/mipsregs.h>
+#include <asm/io.h>
#include <asm/sibyte/sb1250.h>
#include <asm/sibyte/sb1250_regs.h>
#include <asm/sibyte/sb1250_scd.h>
#include <asm/sibyte/64bit.h>
-/* Setup code likely to be common to all BCM1250 platforms */
+unsigned int sb1_pass;
+unsigned int soc_pass;
+unsigned int soc_type;
+unsigned int periph_rev;
+unsigned int zbbus_mhz;
+
+static char *soc_str;
+static char *pass_str;
+static unsigned int war_pass; /* XXXKW don't overload PASS defines? */
+
+static inline int setup_bcm1250(void);
+static inline int setup_bcm112x(void);
+
+/* Setup code likely to be common to all SiByte platforms */
+
+static inline int sys_rev_decode(void)
+{
+ int ret = 0;
+
+ war_pass = soc_pass;
+ switch (soc_type) {
+ case K_SYS_SOC_TYPE_BCM1250:
+ case K_SYS_SOC_TYPE_BCM1250_ALT:
+ case K_SYS_SOC_TYPE_BCM1250_ALT2:
+ soc_str = "BCM1250";
+ ret = setup_bcm1250();
+ break;
+ case K_SYS_SOC_TYPE_BCM1120:
+ soc_str = "BCM1120";
+ ret = setup_bcm112x();
+ break;
+ case K_SYS_SOC_TYPE_BCM1125:
+ soc_str = "BCM1125";
+ ret = setup_bcm112x();
+ break;
+ case K_SYS_SOC_TYPE_BCM1125H:
+ soc_str = "BCM1125H";
+ ret = setup_bcm112x();
+ break;
+ default:
+ prom_printf("Unknown SOC type %x\n", soc_type);
+ ret = 1;
+ break;
+ }
+ return ret;
+}
+
+static inline int setup_bcm1250(void)
+{
+ int ret = 0;
+
+ switch (soc_pass) {
+ case K_SYS_REVISION_BCM1250_PASS1:
+ periph_rev = 1;
+ pass_str = "Pass 1";
+ break;
+ case K_SYS_REVISION_BCM1250_A10:
+ periph_rev = 2;
+ pass_str = "A8/A10";
+ /* XXXKW different war_pass? */
+ war_pass = K_SYS_REVISION_BCM1250_PASS2;
+ break;
+ case K_SYS_REVISION_BCM1250_PASS2_2:
+ periph_rev = 2;
+ pass_str = "B1";
+ break;
+ case K_SYS_REVISION_BCM1250_B2:
+ periph_rev = 2;
+ pass_str = "B2";
+ war_pass = K_SYS_REVISION_BCM1250_PASS2_2;
+ break;
+ case K_SYS_REVISION_BCM1250_PASS3:
+ periph_rev = 3;
+ pass_str = "C0";
+ break;
+ case K_SYS_REVISION_BCM1250_C1:
+ periph_rev = 3;
+ pass_str = "C1";
+ break;
+ default:
+ if (soc_pass < K_SYS_REVISION_BCM1250_PASS2_2) {
+ periph_rev = 2;
+ pass_str = "A0-A6";
+ war_pass = K_SYS_REVISION_BCM1250_PASS2;
+ } else {
+ prom_printf("Unknown BCM1250 rev %x\n", soc_pass);
+ ret = 1;
+ }
+ break;
+ }
+ return ret;
+}
+
+static inline int setup_bcm112x(void)
+{
+ int ret = 0;
-unsigned int sb1250_pass;
+ switch (soc_pass) {
+ case 0:
+ /* Early build didn't have revid set */
+ periph_rev = 3;
+ pass_str = "A1";
+ war_pass = K_SYS_REVISION_BCM112x_A1;
+ break;
+ case K_SYS_REVISION_BCM112x_A1:
+ periph_rev = 3;
+ pass_str = "A1";
+ break;
+ case K_SYS_REVISION_BCM112x_A2:
+ periph_rev = 3;
+ pass_str = "A2";
+ break;
+ default:
+ prom_printf("Unknown %s rev %x\n", soc_str, soc_pass);
+ ret = 1;
+ }
+ return ret;
+}
void sb1250_setup(void)
{
+ uint64_t sys_rev;
+ int plldiv;
int bad_config = 0;
- sb1250_pass = G_SYS_REVISION(in64(IO_SPACE_BASE | A_SCD_SYSTEM_REVISION));
- /* sb1250_pass is more specific than "1", "2" etc. There are
- many revision numbers corresponding to "Pass 2". */
- switch(sb1250_pass) {
- case 1:
+ sb1_pass = read_c0_prid() & 0xff;
+ sys_rev = in64(IO_SPACE_BASE | A_SCD_SYSTEM_REVISION);
+ soc_type = SYS_SOC_TYPE(sys_rev);
+ soc_pass = G_SYS_REVISION(sys_rev);
+
+ if (sys_rev_decode()) {
+ prom_printf("Restart after failure to identify SiByte chip\n");
+ machine_restart(NULL);
+ }
+
+ plldiv = G_SYS_PLL_DIV(in64(IO_SPACE_BASE | A_SCD_SYSTEM_CFG));
+ zbbus_mhz = ((plldiv >> 1) * 50) + ((plldiv & 1) * 25);
#ifndef CONFIG_SB1_PASS_1_WORKAROUNDS
- printk("@@@@ This is a pass 1 board, and the kernel doesn't have the proper workarounds compiled in. @@@@");
+ out64(0, KSEG1 + A_SCD_ZBBUS_CYCLE_COUNT);
+#endif
+
+ prom_printf("Broadcom SiByte %s %s @ %d MHz (SB1 rev %d)\n",
+ soc_str, pass_str, zbbus_mhz * 2, sb1_pass);
+ prom_printf("Board type: %s\n", get_system_type());
+
+ switch(war_pass) {
+ case K_SYS_REVISION_BCM1250_PASS1:
+#ifndef CONFIG_SB1_PASS_1_WORKAROUNDS
+ prom_printf("@@@@ This is a BCM1250 A0-A2 (Pass 1) board, and the kernel doesn't have the proper workarounds compiled in. @@@@\n");
bad_config = 1;
#endif
break;
- default:
-#if defined(CONFIG_CPU_HAS_PREFETCH) || !defined(CONFIG_SB1_PASS_2_WORKAROUNDS)
- printk("@@@@ This is a pass 2 board, and the kernel doesn't have the proper workarounds compiled in. @@@@");
- printk("@@@@ Prefetches are enabled in this kernel, but are buggy on this board. @@@@");
+ case K_SYS_REVISION_BCM1250_PASS2:
+ /* Pass 2 - easiest as default for now - so many numbers */
+#if !defined(CONFIG_SB1_PASS_2_WORKAROUNDS) || !defined(CONFIG_SB1_PASS_2_1_WORKAROUNDS)
+ prom_printf("@@@@ This is a BCM1250 A3-A10 board, and the kernel doesn't have the proper workarounds compiled in. @@@@\n");
+ bad_config = 1;
+#endif
+#ifdef CONFIG_CPU_HAS_PREFETCH
+ prom_printf("@@@@ Prefetches may be enabled in this kernel, but are buggy on this board. @@@@\n");
bad_config = 1;
#endif
break;
+ case K_SYS_REVISION_BCM1250_PASS2_2:
+#ifndef CONFIG_SB1_PASS_2_WORKAROUNDS
+ prom_printf("@@@@ This is a BCM1250 B1/B2. board, and the kernel doesn't have the proper workarounds compiled in. @@@@\n");
+ bad_config = 1;
+#endif
+#if defined(CONFIG_SB1_PASS_2_1_WORKAROUNDS) || !defined(CONFIG_CPU_HAS_PREFETCH)
+ prom_printf("@@@@ This is a BCM1250 B1/B2, but the kernel is conservatively configured for an 'A' stepping. @@@@\n");
+#endif
+ break;
+ default:
+ break;
}
- /* XXXKW this is too early for panic/printk to actually do much! */
if (bad_config) {
- panic("Invalid configuration for this pass.");
+ prom_printf("Invalid configuration for this chip.\n");
+ machine_restart(NULL);
}
}
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