GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
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+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * JZ4780 common routines
+ *
+ * Copyright (c) 2013 Imagination Technologies
+ * Author: Paul Burton <paul.burton@imgtec.com>
+ */
+
+#include <config.h>
+#include <common.h>
+#include <cpu_func.h>
+#include <init.h>
+#include <asm/io.h>
+#include <asm/sections.h>
+#include <mach/jz4780.h>
+#include <mach/jz4780_dram.h>
+#include <mmc.h>
+#include <spl.h>
+
+#ifdef CONFIG_SPL_BUILD
+/* Pointer to the global data structure for SPL */
+DECLARE_GLOBAL_DATA_PTR;
+gd_t gdata __attribute__ ((section(".bss")));
+
+void board_init_f(ulong dummy)
+{
+	typedef void __noreturn (*image_entry_noargs_t)(void);
+	struct mmc *mmc;
+	unsigned long count;
+	struct image_header *header;
+	int ret;
+
+	/* Set global data pointer */
+	gd = &gdata;
+
+	timer_init();
+	pll_init();
+	sdram_init();
+	enable_caches();
+
+	/* Clear the BSS */
+	memset(__bss_start, 0, (char *)&__bss_end - __bss_start);
+
+	gd->flags |= GD_FLG_SPL_INIT;
+
+	ret = mmc_initialize(NULL);
+	if (ret)
+		hang();
+
+	mmc = find_mmc_device(BOOT_DEVICE_MMC1);
+	if (ret)
+		hang();
+
+	ret = mmc_init(mmc);
+	if (ret)
+		hang();
+
+	header = (struct image_header *)(CONFIG_SYS_TEXT_BASE -
+					 sizeof(struct image_header));
+
+	count = blk_dread(mmc_get_blk_desc(mmc),
+			  CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR,
+		0x800, header);
+	if (count == 0)
+		hang();
+
+	image_entry_noargs_t image_entry =
+		(image_entry_noargs_t)CONFIG_SYS_TEXT_BASE;
+
+	image_entry();
+
+	hang();
+}
+#endif /* CONFIG_SPL_BUILD */
+
+ulong board_get_usable_ram_top(ulong total_size)
+{
+	return CONFIG_SYS_SDRAM_BASE + (256 * 1024 * 1024);
+}
+
+int print_cpuinfo(void)
+{
+	printf("CPU:   Ingenic JZ4780\n");
+	return 0;
+}