[ramips] move files to files-3.7

[openwrt.git] / target / linux / ramips / files-3.7 / arch / mips / ralink / common / prom.c

diff --git a/target/linux/ramips/files-3.7/arch/mips/ralink/common/prom.c b/target/linux/ramips/files-3.7/arch/mips/ralink/common/prom.c
new file mode 100644 (file)
index 0000000..26169d3
--- /dev/null
+++ b/target/linux/ramips/files-3.7/arch/mips/ralink/common/prom.c
@@ -0,0 +1,168 @@
+/*
+ *  Ralink SoC specific prom routines
+ *
+ *  Copyright (C) 2010 Joonas Lahtinen <joonas.lahtinen@gmail.com>
+ *  Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/string.h>
+
+#include <asm/bootinfo.h>
+#include <asm/addrspace.h>
+
+#include <asm/mach-ralink/common.h>
+#include <asm/mach-ralink/machine.h>
+
+unsigned long ramips_mem_base;
+unsigned long ramips_mem_size_min;
+unsigned long ramips_mem_size_max;
+
+static inline void *to_ram_addr(void *addr)
+{
+       u32 base;
+
+       base = KSEG0ADDR(ramips_mem_base);
+       if (((u32) addr > base) &&
+           ((u32) addr < (base + ramips_mem_size_max)))
+               return addr;
+
+       base = KSEG1ADDR(ramips_mem_base);
+       if (((u32) addr > base) &&
+           ((u32) addr < (base + ramips_mem_size_max)))
+               return addr;
+
+       /* some U-Boot variants uses physical addresses */
+       base = ramips_mem_base;
+       if (((u32) addr > base) &&
+           ((u32) addr < (base + ramips_mem_size_max)))
+               return (void *)KSEG0ADDR(addr);
+
+       return NULL;
+}
+
+static char ramips_cmdline_buf[COMMAND_LINE_SIZE] __initdata;
+static void __init prom_append_cmdline(const char *name,
+                                      const char *value)
+{
+       snprintf(ramips_cmdline_buf, sizeof(ramips_cmdline_buf),
+                " %s=%s", name, value);
+       strlcat(arcs_cmdline, ramips_cmdline_buf, sizeof(arcs_cmdline));
+}
+
+#ifdef CONFIG_IMAGE_CMDLINE_HACK
+extern char __image_cmdline[];
+
+static int __init use_image_cmdline(void)
+{
+       char *p = __image_cmdline;
+       int replace = 0;
+
+       if (*p == '-') {
+               replace = 1;
+               p++;
+       }
+
+       if (*p == '\0')
+               return 0;
+
+       if (replace) {
+               strlcpy(arcs_cmdline, p, sizeof(arcs_cmdline));
+       } else {
+               strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
+               strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
+       }
+
+       return 1;
+}
+#else
+static int inline use_image_cmdline(void) { return 0; }
+#endif
+
+static __init void prom_init_cmdline(int argc, char **argv)
+{
+       int i;
+
+       if (use_image_cmdline())
+               return;
+
+       if (!argv) {
+               printk(KERN_DEBUG "argv=%p is invalid, skipping\n",
+                      argv);
+               return;
+       }
+
+       for (i = 0; i < argc; i++) {
+               char *p = to_ram_addr(argv[i]);
+
+               if (!p) {
+                       printk(KERN_DEBUG
+                              "argv[%d]=%p is invalid, skipping\n",
+                              i, argv[i]);
+                       continue;
+               }
+
+               printk(KERN_DEBUG "argv[%d]: %s\n", i, p);
+               strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
+               strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
+       }
+}
+
+static __init char *prom_append_env(char **env, const char *envname)
+{
+#define PROM_MAX_ENVS  256
+       int len = strlen(envname);
+       int i;
+
+       if (!env) {
+               printk(KERN_DEBUG "env=%p is not in RAM, skipping\n",
+                      env);
+               return NULL;
+       }
+
+       for (i = 0; i < PROM_MAX_ENVS; i++) {
+               char *p = to_ram_addr(env[i]);
+
+               if (!p)
+                       break;
+
+               printk(KERN_DEBUG "env[%d]: %s\n", i, p);
+               if (strncmp(envname, p, len) == 0 && p[len] == '=')
+                       prom_append_cmdline(envname, p + len + 1);
+       }
+
+       return NULL;
+#undef PROM_MAX_ENVS
+}
+
+void __init prom_init(void)
+{
+       int argc;
+       char **envp;
+       char **argv;
+
+       ramips_soc_prom_init();
+
+       printk(KERN_DEBUG
+              "prom: fw_arg0=%08x, fw_arg1=%08x, fw_arg2=%08x, fw_arg3=%08x\n",
+              (unsigned int)fw_arg0, (unsigned int)fw_arg1,
+              (unsigned int)fw_arg2, (unsigned int)fw_arg3);
+
+       argc = fw_arg0;
+       argv = to_ram_addr((void *)fw_arg1);
+       prom_init_cmdline(argc, argv);
+
+       envp = to_ram_addr((void *)fw_arg2);
+       prom_append_env(envp, "board");
+       prom_append_env(envp, "ethaddr");
+}
+
+void __init prom_free_prom_memory(void)
+{
+       /* We do not have to prom memory to free */
+}