diff options
Diffstat (limited to 'arch/arm/mach-mvebu/cpu.c')
| -rw-r--r-- | arch/arm/mach-mvebu/cpu.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/arch/arm/mach-mvebu/cpu.c b/arch/arm/mach-mvebu/cpu.c new file mode 100644 index 00000000000..1cf70a9f5d5 --- /dev/null +++ b/arch/arm/mach-mvebu/cpu.c @@ -0,0 +1,193 @@ +/* + * Copyright (C) 2014 Stefan Roese <sr@denx.de> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <netdev.h> +#include <asm/io.h> +#include <asm/arch/cpu.h> +#include <asm/arch/soc.h> + +#define DDR_BASE_CS_OFF(n) (0x0000 + ((n) << 3)) +#define DDR_SIZE_CS_OFF(n) (0x0004 + ((n) << 3)) + +static struct mbus_win windows[] = { + /* PCIE MEM address space */ + { DEFADR_PCI_MEM, 256 << 20, CPU_TARGET_PCIE13, CPU_ATTR_PCIE_MEM }, + + /* PCIE IO address space */ + { DEFADR_PCI_IO, 64 << 10, CPU_TARGET_PCIE13, CPU_ATTR_PCIE_IO }, + + /* SPI */ + { DEFADR_SPIF, 8 << 20, CPU_TARGET_DEVICEBUS_BOOTROM_SPI, + CPU_ATTR_SPIFLASH }, + + /* NOR */ + { DEFADR_BOOTROM, 8 << 20, CPU_TARGET_DEVICEBUS_BOOTROM_SPI, + CPU_ATTR_BOOTROM }, +}; + +void reset_cpu(unsigned long ignored) +{ + struct mvebu_system_registers *reg = + (struct mvebu_system_registers *)MVEBU_SYSTEM_REG_BASE; + + writel(readl(®->rstoutn_mask) | 1, ®->rstoutn_mask); + writel(readl(®->sys_soft_rst) | 1, ®->sys_soft_rst); + while (1) + ; +} + +#if defined(CONFIG_DISPLAY_CPUINFO) +int print_cpuinfo(void) +{ + u16 devid = (readl(MVEBU_REG_PCIE_DEVID) >> 16) & 0xffff; + u8 revid = readl(MVEBU_REG_PCIE_REVID) & 0xff; + + puts("SoC: "); + + switch (devid) { + case SOC_MV78460_ID: + puts("MV78460-"); + break; + default: + puts("Unknown-"); + break; + } + + switch (revid) { + case 1: + puts("A0\n"); + break; + case 2: + puts("B0\n"); + break; + default: + puts("??\n"); + break; + } + + return 0; +} +#endif /* CONFIG_DISPLAY_CPUINFO */ + +/* + * This function initialize Controller DRAM Fastpath windows. + * It takes the CS size information from the 0x1500 scratch registers + * and sets the correct windows sizes and base addresses accordingly. + * + * These values are set in the scratch registers by the Marvell + * DDR3 training code, which is executed by the BootROM before the + * main payload (U-Boot) is executed. This training code is currently + * only available in the Marvell U-Boot version. It needs to be + * ported to mainline U-Boot SPL at some point. + */ +static void update_sdram_window_sizes(void) +{ + u64 base = 0; + u32 size, temp; + int i; + + for (i = 0; i < SDRAM_MAX_CS; i++) { + size = readl((MVEBU_SDRAM_SCRATCH + (i * 8))) & SDRAM_ADDR_MASK; + if (size != 0) { + size |= ~(SDRAM_ADDR_MASK); + + /* Set Base Address */ + temp = (base & 0xFF000000ll) | ((base >> 32) & 0xF); + writel(temp, MVEBU_SDRAM_BASE + DDR_BASE_CS_OFF(i)); + + /* + * Check if out of max window size and resize + * the window + */ + temp = (readl(MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i)) & + ~(SDRAM_ADDR_MASK)) | 1; + temp |= (size & SDRAM_ADDR_MASK); + writel(temp, MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i)); + + base += ((u64)size + 1); + } else { + /* + * Disable window if not used, otherwise this + * leads to overlapping enabled windows with + * pretty strange results + */ + clrbits_le32(MVEBU_SDRAM_BASE + DDR_SIZE_CS_OFF(i), 1); + } + } +} + +#ifdef CONFIG_ARCH_CPU_INIT +int arch_cpu_init(void) +{ + /* Linux expects the internal registers to be at 0xf1000000 */ + writel(SOC_REGS_PHY_BASE, INTREG_BASE_ADDR_REG); + + /* + * We need to call mvebu_mbus_probe() before calling + * update_sdram_window_sizes() as it disables all previously + * configured mbus windows and then configures them as + * required for U-Boot. Calling update_sdram_window_sizes() + * without this configuration will not work, as the internal + * registers can't be accessed reliably because of potenial + * double mapping. + * After updating the SDRAM access windows we need to call + * mvebu_mbus_probe() again, as this now correctly configures + * the SDRAM areas that are later used by the MVEBU drivers + * (e.g. USB, NETA). + */ + + /* + * First disable all windows + */ + mvebu_mbus_probe(NULL, 0); + + /* + * Now the SDRAM access windows can be reconfigured using + * the information in the SDRAM scratch pad registers + */ + update_sdram_window_sizes(); + + /* + * Finally the mbus windows can be configured with the + * updated SDRAM sizes + */ + mvebu_mbus_probe(windows, ARRAY_SIZE(windows)); + + return 0; +} +#endif /* CONFIG_ARCH_CPU_INIT */ + +/* + * SOC specific misc init + */ +#if defined(CONFIG_ARCH_MISC_INIT) +int arch_misc_init(void) +{ + /* Nothing yet, perhaps we need something here later */ + return 0; +} +#endif /* CONFIG_ARCH_MISC_INIT */ + +#ifdef CONFIG_MVNETA +int cpu_eth_init(bd_t *bis) +{ + mvneta_initialize(bis, MVEBU_EGIGA0_BASE, 0, CONFIG_PHY_BASE_ADDR + 0); + mvneta_initialize(bis, MVEBU_EGIGA1_BASE, 1, CONFIG_PHY_BASE_ADDR + 1); + mvneta_initialize(bis, MVEBU_EGIGA2_BASE, 2, CONFIG_PHY_BASE_ADDR + 2); + mvneta_initialize(bis, MVEBU_EGIGA3_BASE, 3, CONFIG_PHY_BASE_ADDR + 3); + + return 0; +} +#endif + +#ifndef CONFIG_SYS_DCACHE_OFF +void enable_caches(void) +{ + /* Enable D-cache. I-cache is already enabled in start.S */ + dcache_enable(); +} +#endif |