Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/mips/ddb5xxx/common/prom.c b/arch/mips/ddb5xxx/common/prom.c
new file mode 100644
index 0000000..b8d1f74
--- /dev/null
+++ b/arch/mips/ddb5xxx/common/prom.c
@@ -0,0 +1,142 @@
+/*
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/bootmem.h>
+
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+#include <asm/ddb5xxx/ddb5xxx.h>
+#include <asm/debug.h>
+
+const char *get_system_type(void)
+{
+ switch (mips_machtype) {
+ case MACH_NEC_DDB5074: return "NEC DDB Vrc-5074";
+ case MACH_NEC_DDB5476: return "NEC DDB Vrc-5476";
+ case MACH_NEC_DDB5477: return "NEC DDB Vrc-5477";
+ case MACH_NEC_ROCKHOPPER: return "NEC Rockhopper";
+ case MACH_NEC_ROCKHOPPERII: return "NEC RockhopperII";
+ default: return "Unknown NEC board";
+ }
+}
+
+#if defined(CONFIG_DDB5477)
+void ddb5477_runtime_detection(void);
+#endif
+
+/* [jsun@junsun.net] PMON passes arguments in C main() style */
+void __init prom_init(void)
+{
+ int argc = fw_arg0;
+ char **arg = (char**) fw_arg1;
+ int i;
+
+ /* if user passes kernel args, ignore the default one */
+ if (argc > 1)
+ arcs_cmdline[0] = '\0';
+
+ /* arg[0] is "g", the rest is boot parameters */
+ for (i = 1; i < argc; i++) {
+ if (strlen(arcs_cmdline) + strlen(arg[i] + 1)
+ >= sizeof(arcs_cmdline))
+ break;
+ strcat(arcs_cmdline, arg[i]);
+ strcat(arcs_cmdline, " ");
+ }
+
+ mips_machgroup = MACH_GROUP_NEC_DDB;
+
+#if defined(CONFIG_DDB5074)
+ mips_machtype = MACH_NEC_DDB5074;
+ add_memory_region(0, DDB_SDRAM_SIZE, BOOT_MEM_RAM);
+#elif defined(CONFIG_DDB5476)
+ mips_machtype = MACH_NEC_DDB5476;
+ add_memory_region(0, DDB_SDRAM_SIZE, BOOT_MEM_RAM);
+#elif defined(CONFIG_DDB5477)
+ ddb5477_runtime_detection();
+ add_memory_region(0, board_ram_size, BOOT_MEM_RAM);
+#endif
+}
+
+unsigned long __init prom_free_prom_memory(void)
+{
+ return 0;
+}
+
+#if defined(CONFIG_DDB5477)
+
+#define DEFAULT_LCS1_BASE 0x19000000
+#define TESTVAL1 'K'
+#define TESTVAL2 'S'
+
+int board_ram_size;
+void ddb5477_runtime_detection(void)
+{
+ volatile char *test_offset;
+ char saved_test_byte;
+
+ /* Determine if this is a DDB5477 board, or a BSB-VR0300
+ base board. We can tell by checking for the location of
+ the NVRAM. It lives at the beginning of LCS1 on the DDB5477,
+ and the beginning of LCS1 on the BSB-VR0300 is flash memory.
+ The first 2K of the NVRAM are reserved, so don't we'll poke
+ around just after that.
+ */
+
+ /* We can only use the PCI bus to distinquish between
+ the Rockhopper and RockhopperII backplanes and this must
+ wait until ddb5477_board_init() in setup.c after the 5477
+ is initialized. So, until then handle
+ both Rockhopper and RockhopperII backplanes as Rockhopper 1
+ */
+
+ test_offset = (char *)KSEG1ADDR(DEFAULT_LCS1_BASE + 0x800);
+ saved_test_byte = *test_offset;
+
+ *test_offset = TESTVAL1;
+ if (*test_offset != TESTVAL1) {
+ /* We couldn't set our test value, so it must not be NVRAM,
+ so it's a BSB_VR0300 */
+ mips_machtype = MACH_NEC_ROCKHOPPER;
+ } else {
+ /* We may have gotten lucky, and the TESTVAL1 was already
+ stored at the test location, so we must check a second
+ test value */
+ *test_offset = TESTVAL2;
+ if (*test_offset != TESTVAL2) {
+ /* OK, we couldn't set this value either, so it must
+ definately be a BSB_VR0300 */
+ mips_machtype = MACH_NEC_ROCKHOPPER;
+ } else {
+ /* We could change the value twice, so it must be
+ NVRAM, so it's a DDB_VRC5477 */
+ mips_machtype = MACH_NEC_DDB5477;
+ }
+ }
+ /* Restore the original byte */
+ *test_offset = saved_test_byte;
+
+ /* before we know a better way, we will trust PMON for getting
+ * RAM size
+ */
+ board_ram_size = 1 << (36 - (ddb_in32(DDB_SDRAM0) & 0xf));
+
+ db_run(printk("DDB run-time detection : %s, %d MB RAM\n",
+ mips_machtype == MACH_NEC_DDB5477 ?
+ "DDB5477" : "Rockhopper",
+ board_ram_size >> 20));
+
+ /* we can't handle ram size > 128 MB */
+ db_assert(board_ram_size <= (128 << 20));
+}
+#endif