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

source/bootloader/u-boot-2020.01/arch/powerpc/cpu/mpc83xx/cpu.c

@@ -0,0 +1,251 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ */
+
+/*
+ * CPU specific code for the MPC83xx family.
+ *
+ * Derived from the MPC8260 and MPC85xx.
+ */
+
+#include <common.h>
+#include <cpu_func.h>
+#include <irq_func.h>
+#include <vsprintf.h>
+#include <watchdog.h>
+#include <command.h>
+#include <mpc83xx.h>
+#include <asm/processor.h>
+#include <linux/libfdt.h>
+#include <tsec.h>
+#include <netdev.h>
+#include <fsl_esdhc.h>
+#if defined(CONFIG_BOOTCOUNT_LIMIT) && !defined(CONFIG_ARCH_MPC831X)
+#include <linux/immap_qe.h>
+#include <asm/io.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifndef CONFIG_CPU_MPC83XX
+int checkcpu(void)
+{
+	volatile immap_t *immr;
+	ulong clock = gd->cpu_clk;
+	u32 pvr = get_pvr();
+	u32 spridr;
+	char buf[32];
+	int ret;
+	int i;
+
+	const struct cpu_type {
+		char name[15];
+		u32 partid;
+	} cpu_type_list [] = {
+		CPU_TYPE_ENTRY(8308),
+		CPU_TYPE_ENTRY(8309),
+		CPU_TYPE_ENTRY(8311),
+		CPU_TYPE_ENTRY(8313),
+		CPU_TYPE_ENTRY(8314),
+		CPU_TYPE_ENTRY(8315),
+		CPU_TYPE_ENTRY(8321),
+		CPU_TYPE_ENTRY(8323),
+		CPU_TYPE_ENTRY(8343),
+		CPU_TYPE_ENTRY(8347_TBGA_),
+		CPU_TYPE_ENTRY(8347_PBGA_),
+		CPU_TYPE_ENTRY(8349),
+		CPU_TYPE_ENTRY(8358_TBGA_),
+		CPU_TYPE_ENTRY(8358_PBGA_),
+		CPU_TYPE_ENTRY(8360),
+		CPU_TYPE_ENTRY(8377),
+		CPU_TYPE_ENTRY(8378),
+		CPU_TYPE_ENTRY(8379),
+	};
+
+	immr = (immap_t *)CONFIG_SYS_IMMR;
+
+	ret = prt_83xx_rsr();
+	if (ret)
+		return ret;
+
+	puts("CPU:   ");
+
+	switch (pvr & 0xffff0000) {
+		case PVR_E300C1:
+			printf("e300c1, ");
+			break;
+
+		case PVR_E300C2:
+			printf("e300c2, ");
+			break;
+
+		case PVR_E300C3:
+			printf("e300c3, ");
+			break;
+
+		case PVR_E300C4:
+			printf("e300c4, ");
+			break;
+
+		default:
+			printf("Unknown core, ");
+	}
+
+	spridr = immr->sysconf.spridr;
+
+	for (i = 0; i < ARRAY_SIZE(cpu_type_list); i++)
+		if (cpu_type_list[i].partid == PARTID_NO_E(spridr)) {
+			puts("MPC");
+			puts(cpu_type_list[i].name);
+			if (IS_E_PROCESSOR(spridr))
+				puts("E");
+			if ((SPR_FAMILY(spridr) == SPR_834X_FAMILY ||
+			     SPR_FAMILY(spridr) == SPR_836X_FAMILY) &&
+			    REVID_MAJOR(spridr) >= 2)
+				puts("A");
+			printf(", Rev: %d.%d", REVID_MAJOR(spridr),
+			       REVID_MINOR(spridr));
+			break;
+		}
+
+	if (i == ARRAY_SIZE(cpu_type_list))
+		printf("(SPRIDR %08x unknown), ", spridr);
+
+	printf(" at %s MHz, ", strmhz(buf, clock));
+
+	printf("CSB: %s MHz\n", strmhz(buf, gd->arch.csb_clk));
+
+	return 0;
+}
+#endif
+
+#ifndef CONFIG_SYSRESET
+int
+do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
+{
+	ulong msr;
+#ifndef MPC83xx_RESET
+	ulong addr;
+#endif
+
+	volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
+
+	puts("Resetting the board.\n");
+
+#ifdef MPC83xx_RESET
+
+	/* Interrupts and MMU off */
+	msr = mfmsr();
+	msr &= ~(MSR_EE | MSR_IR | MSR_DR);
+	mtmsr(msr);
+
+	/* enable Reset Control Reg */
+	immap->reset.rpr = 0x52535445;
+	sync();
+	isync();
+
+	/* confirm Reset Control Reg is enabled */
+	while(!((immap->reset.rcer) & RCER_CRE))
+		;
+
+	udelay(200);
+
+	/* perform reset, only one bit */
+	immap->reset.rcr = RCR_SWHR;
+
+#else	/* ! MPC83xx_RESET */
+
+	immap->reset.rmr = RMR_CSRE;    /* Checkstop Reset enable */
+
+	/* Interrupts and MMU off */
+	msr = mfmsr();
+	msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
+	mtmsr(msr);
+
+	/*
+	 * Trying to execute the next instruction at a non-existing address
+	 * should cause a machine check, resulting in reset
+	 */
+	addr = CONFIG_SYS_RESET_ADDRESS;
+
+	((void (*)(void)) addr) ();
+#endif	/* MPC83xx_RESET */
+
+	return 1;
+}
+#endif
+
+/*
+ * Get timebase clock frequency (like cpu_clk in Hz)
+ */
+#ifndef CONFIG_TIMER
+unsigned long get_tbclk(void)
+{
+	return (gd->bus_clk + 3L) / 4L;
+}
+#endif
+
+#if defined(CONFIG_WATCHDOG)
+void watchdog_reset (void)
+{
+	int re_enable = disable_interrupts();
+
+	/* Reset the 83xx watchdog */
+	volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
+	immr->wdt.swsrr = 0x556c;
+	immr->wdt.swsrr = 0xaa39;
+
+	if (re_enable)
+		enable_interrupts();
+}
+#endif
+
+#ifndef CONFIG_DM_ETH
+/*
+ * Initializes on-chip ethernet controllers.
+ * to override, implement board_eth_init()
+ */
+int cpu_eth_init(bd_t *bis)
+{
+#if defined(CONFIG_UEC_ETH)
+	uec_standard_init(bis);
+#endif
+
+#if defined(CONFIG_TSEC_ENET)
+	tsec_standard_init(bis);
+#endif
+	return 0;
+}
+#endif /* !CONFIG_DM_ETH */
+
+/*
+ * Initializes on-chip MMC controllers.
+ * to override, implement board_mmc_init()
+ */
+int cpu_mmc_init(bd_t *bis)
+{
+#ifdef CONFIG_FSL_ESDHC
+	return fsl_esdhc_mmc_init(bis);
+#else
+	return 0;
+#endif
+}
+
+void ppcDWstore(unsigned int *addr, unsigned int *value)
+{
+	asm("lfd 1, 0(%1)\n\t"
+	    "stfd 1, 0(%0)"
+	    :
+	    : "r" (addr), "r" (value)
+	    : "memory");
+}
+
+void ppcDWload(unsigned int *addr, unsigned int *ret)
+{
+	asm("lfd 1, 0(%0)\n\t"
+	    "stfd 1, 0(%1)"
+	    :
+	    : "r" (addr), "r" (ret)
+	    : "memory");
+}