diff options
Diffstat (limited to 'arch/powerpc/cpu/mpc86xx/cpu.c')
| -rw-r--r-- | arch/powerpc/cpu/mpc86xx/cpu.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/mpc86xx/cpu.c b/arch/powerpc/cpu/mpc86xx/cpu.c new file mode 100644 index 0000000..1887575 --- /dev/null +++ b/arch/powerpc/cpu/mpc86xx/cpu.c @@ -0,0 +1,233 @@ +/* + * Copyright 2006,2009-2010 Freescale Semiconductor, Inc. + * Jeff Brown + * Srikanth Srinivasan (srikanth.srinivasan@freescale.com) + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <watchdog.h> +#include <command.h> +#include <asm/cache.h> +#include <asm/mmu.h> +#include <mpc86xx.h> +#include <asm/fsl_law.h> + +DECLARE_GLOBAL_DATA_PTR; + +/* + * Default board reset function + */ +static void +__board_reset(void) +{ + /* Do nothing */ +} +void board_reset(void) __attribute__((weak, alias("__board_reset"))); + + +int +checkcpu(void) +{ + sys_info_t sysinfo; + uint pvr, svr; + uint ver; + uint major, minor; + char buf1[32], buf2[32]; + volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; + volatile ccsr_gur_t *gur = &immap->im_gur; + struct cpu_type *cpu; + uint msscr0 = mfspr(MSSCR0); + + svr = get_svr(); + ver = SVR_SOC_VER(svr); + major = SVR_MAJ(svr); + minor = SVR_MIN(svr); + + if (cpu_numcores() > 1) { +#ifndef CONFIG_MP + puts("Unicore software on multiprocessor system!!\n" + "To enable mutlticore build define CONFIG_MP\n"); +#endif + } + puts("CPU: "); + + cpu = gd->cpu; + + puts(cpu->name); + + printf(", Version: %d.%d, (0x%08x)\n", major, minor, svr); + puts("Core: "); + + pvr = get_pvr(); + ver = PVR_E600_VER(pvr); + major = PVR_E600_MAJ(pvr); + minor = PVR_E600_MIN(pvr); + + printf("E600 Core %d", (msscr0 & 0x20) ? 1 : 0 ); + if (gur->pordevsr & MPC86xx_PORDEVSR_CORE1TE) + puts("\n Core1Translation Enabled"); + debug(" (MSSCR0=%x, PORDEVSR=%x)", msscr0, gur->pordevsr); + + printf(", Version: %d.%d, (0x%08x)\n", major, minor, pvr); + + get_sys_info(&sysinfo); + + puts("Clock Configuration:\n"); + printf(" CPU:%-4s MHz, ", strmhz(buf1, sysinfo.freqProcessor)); + printf("MPX:%-4s MHz\n", strmhz(buf1, sysinfo.freqSystemBus)); + printf(" DDR:%-4s MHz (%s MT/s data rate), ", + strmhz(buf1, sysinfo.freqSystemBus / 2), + strmhz(buf2, sysinfo.freqSystemBus)); + + if (sysinfo.freqLocalBus > LCRR_CLKDIV) { + printf("LBC:%-4s MHz\n", strmhz(buf1, sysinfo.freqLocalBus)); + } else { + printf("LBC: unknown (LCRR[CLKDIV] = 0x%02lx)\n", + sysinfo.freqLocalBus); + } + + puts("L1: D-cache 32 KB enabled\n"); + puts(" I-cache 32 KB enabled\n"); + + puts("L2: "); + if (get_l2cr() & 0x80000000) { +#if defined(CONFIG_MPC8610) + puts("256"); +#elif defined(CONFIG_MPC8641) + puts("512"); +#endif + puts(" KB enabled\n"); + } else { + puts("Disabled\n"); + } + + return 0; +} + + +void +do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; + volatile ccsr_gur_t *gur = &immap->im_gur; + + /* Attempt board-specific reset */ + board_reset(); + + /* Next try asserting HRESET_REQ */ + out_be32(&gur->rstcr, MPC86xx_RSTCR_HRST_REQ); + + while (1) + ; +} + + +/* + * Get timebase clock frequency + */ +unsigned long +get_tbclk(void) +{ + sys_info_t sys_info; + + get_sys_info(&sys_info); + return (sys_info.freqSystemBus + 3L) / 4L; +} + + +#if defined(CONFIG_WATCHDOG) +void +watchdog_reset(void) +{ +#if defined(CONFIG_MPC8610) + /* + * This actually feed the hard enabled watchdog. + */ + volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; + volatile ccsr_wdt_t *wdt = &immap->im_wdt; + volatile ccsr_gur_t *gur = &immap->im_gur; + u32 tmp = gur->pordevsr; + + if (tmp & 0x4000) { + wdt->swsrr = 0x556c; + wdt->swsrr = 0xaa39; + } +#endif +} +#endif /* CONFIG_WATCHDOG */ + +/* + * Print out the state of various machine registers. + * Currently prints out LAWs, BR0/OR0, and BATs + */ +void mpc86xx_reginfo(void) +{ + immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; + ccsr_lbc_t *lbc = &immap->im_lbc; + + print_bats(); + print_laws(); + + printf ("Local Bus Controller Registers\n" + "\tBR0\t0x%08X\tOR0\t0x%08X \n", in_be32(&lbc->br0), in_be32(&lbc->or0)); + printf("\tBR1\t0x%08X\tOR1\t0x%08X \n", in_be32(&lbc->br1), in_be32(&lbc->or1)); + printf("\tBR2\t0x%08X\tOR2\t0x%08X \n", in_be32(&lbc->br2), in_be32(&lbc->or2)); + printf("\tBR3\t0x%08X\tOR3\t0x%08X \n", in_be32(&lbc->br3), in_be32(&lbc->or3)); + printf("\tBR4\t0x%08X\tOR4\t0x%08X \n", in_be32(&lbc->br4), in_be32(&lbc->or4)); + printf("\tBR5\t0x%08X\tOR5\t0x%08X \n", in_be32(&lbc->br5), in_be32(&lbc->or5)); + printf("\tBR6\t0x%08X\tOR6\t0x%08X \n", in_be32(&lbc->br6), in_be32(&lbc->or6)); + printf("\tBR7\t0x%08X\tOR7\t0x%08X \n", in_be32(&lbc->br7), in_be32(&lbc->or7)); + +} + +/* + * Set the DDR BATs to reflect the actual size of DDR. + * + * dram_size is the actual size of DDR, in bytes + * + * Note: we assume that CONFIG_MAX_MEM_MAPPED is 2G or smaller as we only + * are using a single BAT to cover DDR. + * + * If this is not true, (e.g. CONFIG_MAX_MEM_MAPPED is 2GB but HID0_XBSEN + * is not defined) then we might have a situation where U-Boot will attempt + * to relocated itself outside of the region mapped by DBAT0. + * This will cause a machine check. + * + * Currently we are limited to power of two sized DDR since we only use a + * single bat. If a non-power of two size is used that is less than + * CONFIG_MAX_MEM_MAPPED u-boot will crash. + * + */ +void setup_ddr_bat(phys_addr_t dram_size) +{ + unsigned long batu, bl; + + bl = TO_BATU_BL(min(dram_size, CONFIG_MAX_MEM_MAPPED)); + + if (BATU_SIZE(bl) != dram_size) { + u64 sz = (u64)dram_size - BATU_SIZE(bl); + print_size(sz, " left unmapped\n"); + } + + batu = bl | BATU_VS | BATU_VP; + write_bat(DBAT0, batu, CONFIG_SYS_DBAT0L); + write_bat(IBAT0, batu, CONFIG_SYS_IBAT0L); +} |