1 files changed, 338 insertions, 0 deletions
diff --git a/roms/u-boot/arch/mips/lib/bootm.c b/roms/u-boot/arch/mips/lib/bootm.c
new file mode 100644
index 000000000..fde90fced
--- /dev/null
+++ b/roms/u-boot/arch/mips/lib/bootm.c
@@ -0,0 +1,338 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ */
+
+#include <common.h>
+#include <bootstage.h>
+#include <env.h>
+#include <image.h>
+#include <fdt_support.h>
+#include <lmb.h>
+#include <log.h>
+#include <asm/addrspace.h>
+#include <asm/global_data.h>
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define	LINUX_MAX_ENVS		256
+#define	LINUX_MAX_ARGS		256
+
+static int linux_argc;
+static char **linux_argv;
+static char *linux_argp;
+
+static char **linux_env;
+static char *linux_env_p;
+static int linux_env_idx;
+
+static ulong arch_get_sp(void)
+{
+	ulong ret;
+
+	__asm__ __volatile__("move %0, $sp" : "=r"(ret) : );
+
+	return ret;
+}
+
+void arch_lmb_reserve(struct lmb *lmb)
+{
+	ulong sp;
+
+	sp = arch_get_sp();
+	debug("## Current stack ends at 0x%08lx\n", sp);
+
+	/* adjust sp by 4K to be safe */
+	sp -= 4096;
+	lmb_reserve(lmb, sp, gd->ram_top - sp);
+}
+
+static void linux_cmdline_init(void)
+{
+	linux_argc = 1;
+	linux_argv = (char **)CKSEG1ADDR(gd->bd->bi_boot_params);
+	linux_argv[0] = 0;
+	linux_argp = (char *)(linux_argv + LINUX_MAX_ARGS);
+}
+
+static void linux_cmdline_set(const char *value, size_t len)
+{
+	linux_argv[linux_argc] = linux_argp;
+	memcpy(linux_argp, value, len);
+	linux_argp[len] = 0;
+
+	linux_argp += len + 1;
+	linux_argc++;
+}
+
+static void linux_cmdline_dump(void)
+{
+	int i;
+
+	debug("## cmdline argv at 0x%p, argp at 0x%p\n",
+	      linux_argv, linux_argp);
+
+	for (i = 1; i < linux_argc; i++)
+		debug("   arg %03d: %s\n", i, linux_argv[i]);
+}
+
+static void linux_cmdline_legacy(bootm_headers_t *images)
+{
+	const char *bootargs, *next, *quote;
+
+	linux_cmdline_init();
+
+	bootargs = env_get("bootargs");
+	if (!bootargs)
+		return;
+
+	next = bootargs;
+
+	while (bootargs && *bootargs && linux_argc < LINUX_MAX_ARGS) {
+		quote = strchr(bootargs, '"');
+		next = strchr(bootargs, ' ');
+
+		while (next && quote && quote < next) {
+			/*
+			 * we found a left quote before the next blank
+			 * now we have to find the matching right quote
+			 */
+			next = strchr(quote + 1, '"');
+			if (next) {
+				quote = strchr(next + 1, '"');
+				next = strchr(next + 1, ' ');
+			}
+		}
+
+		if (!next)
+			next = bootargs + strlen(bootargs);
+
+		linux_cmdline_set(bootargs, next - bootargs);
+
+		if (*next)
+			next++;
+
+		bootargs = next;
+	}
+}
+
+static void linux_cmdline_append(bootm_headers_t *images)
+{
+	char buf[24];
+	ulong mem, rd_start, rd_size;
+
+	/* append mem */
+	mem = gd->ram_size >> 20;
+	sprintf(buf, "mem=%luM", mem);
+	linux_cmdline_set(buf, strlen(buf));
+
+	/* append rd_start and rd_size */
+	rd_start = images->initrd_start;
+	rd_size = images->initrd_end - images->initrd_start;
+
+	if (rd_size) {
+		sprintf(buf, "rd_start=0x%08lX", rd_start);
+		linux_cmdline_set(buf, strlen(buf));
+		sprintf(buf, "rd_size=0x%lX", rd_size);
+		linux_cmdline_set(buf, strlen(buf));
+	}
+}
+
+static void linux_env_init(void)
+{
+	linux_env = (char **)(((ulong) linux_argp + 15) & ~15);
+	linux_env[0] = 0;
+	linux_env_p = (char *)(linux_env + LINUX_MAX_ENVS);
+	linux_env_idx = 0;
+}
+
+static void linux_env_set(const char *env_name, const char *env_val)
+{
+	if (linux_env_idx < LINUX_MAX_ENVS - 1) {
+		linux_env[linux_env_idx] = linux_env_p;
+
+		strcpy(linux_env_p, env_name);
+		linux_env_p += strlen(env_name);
+
+		if (CONFIG_IS_ENABLED(MALTA)) {
+			linux_env_p++;
+			linux_env[++linux_env_idx] = linux_env_p;
+		} else {
+			*linux_env_p++ = '=';
+		}
+
+		strcpy(linux_env_p, env_val);
+		linux_env_p += strlen(env_val);
+
+		linux_env_p++;
+		linux_env[++linux_env_idx] = 0;
+	}
+}
+
+static void linux_env_legacy(bootm_headers_t *images)
+{
+	char env_buf[12];
+	const char *cp;
+	ulong rd_start, rd_size;
+
+	if (CONFIG_IS_ENABLED(MEMSIZE_IN_BYTES)) {
+		sprintf(env_buf, "%lu", (ulong)gd->ram_size);
+		debug("## Giving linux memsize in bytes, %lu\n",
+		      (ulong)gd->ram_size);
+	} else {
+		sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20));
+		debug("## Giving linux memsize in MB, %lu\n",
+		      (ulong)(gd->ram_size >> 20));
+	}
+
+	rd_start = CKSEG1ADDR(images->initrd_start);
+	rd_size = images->initrd_end - images->initrd_start;
+
+	linux_env_init();
+
+	linux_env_set("memsize", env_buf);
+
+	sprintf(env_buf, "0x%08lX", rd_start);
+	linux_env_set("initrd_start", env_buf);
+
+	sprintf(env_buf, "0x%lX", rd_size);
+	linux_env_set("initrd_size", env_buf);
+
+	sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart));
+	linux_env_set("flash_start", env_buf);
+
+	sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize));
+	linux_env_set("flash_size", env_buf);
+
+	cp = env_get("ethaddr");
+	if (cp)
+		linux_env_set("ethaddr", cp);
+
+	cp = env_get("eth1addr");
+	if (cp)
+		linux_env_set("eth1addr", cp);
+
+	if (CONFIG_IS_ENABLED(MALTA)) {
+		sprintf(env_buf, "%un8r", gd->baudrate);
+		linux_env_set("modetty0", env_buf);
+	}
+}
+
+static int boot_reloc_fdt(bootm_headers_t *images)
+{
+	/*
+	 * In case of legacy uImage's, relocation of FDT is already done
+	 * by do_bootm_states() and should not repeated in 'bootm prep'.
+	 */
+	if (images->state & BOOTM_STATE_FDT) {
+		debug("## FDT already relocated\n");
+		return 0;
+	}
+
+#if CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && CONFIG_IS_ENABLED(OF_LIBFDT)
+	boot_fdt_add_mem_rsv_regions(&images->lmb, images->ft_addr);
+	return boot_relocate_fdt(&images->lmb, &images->ft_addr,
+		&images->ft_len);
+#else
+	return 0;
+#endif
+}
+
+#if CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && CONFIG_IS_ENABLED(OF_LIBFDT)
+int arch_fixup_fdt(void *blob)
+{
+	u64 mem_start = virt_to_phys((void *)gd->ram_base);
+	u64 mem_size = gd->ram_size;
+
+	return fdt_fixup_memory_banks(blob, &mem_start, &mem_size, 1);
+}
+#endif
+
+static int boot_setup_fdt(bootm_headers_t *images)
+{
+	images->initrd_start = virt_to_phys((void *)images->initrd_start);
+	images->initrd_end = virt_to_phys((void *)images->initrd_end);
+	return image_setup_libfdt(images, images->ft_addr, images->ft_len,
+		&images->lmb);
+}
+
+static void boot_prep_linux(bootm_headers_t *images)
+{
+	if (CONFIG_IS_ENABLED(MIPS_BOOT_FDT) && images->ft_len) {
+		boot_reloc_fdt(images);
+		boot_setup_fdt(images);
+	} else {
+		if (CONFIG_IS_ENABLED(MIPS_BOOT_CMDLINE_LEGACY)) {
+			linux_cmdline_legacy(images);
+
+			if (!CONFIG_IS_ENABLED(MIPS_BOOT_ENV_LEGACY))
+				linux_cmdline_append(images);
+
+			linux_cmdline_dump();
+		}
+
+		if (CONFIG_IS_ENABLED(MIPS_BOOT_ENV_LEGACY))
+			linux_env_legacy(images);
+	}
+}
+
+static void boot_jump_linux(bootm_headers_t *images)
+{
+	typedef void __noreturn (*kernel_entry_t)(int, ulong, ulong, ulong);
+	kernel_entry_t kernel = (kernel_entry_t) images->ep;
+	ulong linux_extra = 0;
+
+	debug("## Transferring control to Linux (at address %p) ...\n", kernel);
+
+	bootstage_mark(BOOTSTAGE_ID_RUN_OS);
+
+	if (CONFIG_IS_ENABLED(MALTA))
+		linux_extra = gd->ram_size;
+
+#if CONFIG_IS_ENABLED(BOOTSTAGE_FDT)
+	bootstage_fdt_add_report();
+#endif
+#if CONFIG_IS_ENABLED(BOOTSTAGE_REPORT)
+	bootstage_report();
+#endif
+
+	if (CONFIG_IS_ENABLED(RESTORE_EXCEPTION_VECTOR_BASE))
+		trap_restore();
+
+	if (images->ft_len)
+		kernel(-2, (ulong)images->ft_addr, 0, 0);
+	else
+		kernel(linux_argc, (ulong)linux_argv, (ulong)linux_env,
+			linux_extra);
+}
+
+int do_bootm_linux(int flag, int argc, char *const argv[],
+		   bootm_headers_t *images)
+{
+	/* No need for those on MIPS */
+	if (flag & BOOTM_STATE_OS_BD_T)
+		return -1;
+
+	/*
+	 * Cmdline init has been moved to 'bootm prep' because it has to be
+	 * done after relocation of ramdisk to always pass correct values
+	 * for rd_start and rd_size to Linux kernel.
+	 */
+	if (flag & BOOTM_STATE_OS_CMDLINE)
+		return 0;
+
+	if (flag & BOOTM_STATE_OS_PREP) {
+		boot_prep_linux(images);
+		return 0;
+	}
+
+	if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
+		boot_jump_linux(images);
+		return 0;
+	}
+
+	/* does not return */
+	return 1;
+}