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

source/bootloader/u-boot-2020.01/arch/mips/mach-mscc/dram.c

@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2018 Microsemi Corporation
+ */
+
+#include <common.h>
+
+#include <asm/io.h>
+#include <asm/types.h>
+
+#include <mach/tlb.h>
+#include <mach/ddr.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static inline int vcoreiii_train_bytelane(void)
+{
+	int ret;
+
+	ret = hal_vcoreiii_train_bytelane(0);
+
+#if defined(CONFIG_SOC_OCELOT) || defined(CONFIG_SOC_JR2) || \
+	defined(CONFIG_SOC_SERVALT) || defined(CONFIG_SOC_SERVAL)
+	if (ret)
+		return ret;
+	ret = hal_vcoreiii_train_bytelane(1);
+#endif
+
+	return ret;
+}
+
+int vcoreiii_ddr_init(void)
+{
+	int res;
+
+	if (!(readl(BASE_CFG + ICPU_MEMCTRL_STAT)
+	      & ICPU_MEMCTRL_STAT_INIT_DONE)) {
+		hal_vcoreiii_init_memctl();
+		hal_vcoreiii_wait_memctl();
+		if (hal_vcoreiii_init_dqs() || vcoreiii_train_bytelane())
+			hal_vcoreiii_ddr_failed();
+	}
+#if (CONFIG_SYS_TEXT_BASE != 0x20000000)
+	res = dram_check();
+	if (res == 0)
+		hal_vcoreiii_ddr_verified();
+	else
+		hal_vcoreiii_ddr_failed();
+
+	/* Clear boot-mode and read-back to activate/verify */
+	clrbits_le32(BASE_CFG + ICPU_GENERAL_CTRL,
+		     ICPU_GENERAL_CTRL_BOOT_MODE_ENA);
+	readl(BASE_CFG + ICPU_GENERAL_CTRL);
+#else
+	res = 0;
+#endif
+	return res;
+}
+
+int print_cpuinfo(void)
+{
+	printf("MSCC VCore-III MIPS 24Kec\n");
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	while (vcoreiii_ddr_init())
+		;
+
+	gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
+	return 0;
+}