diff options
Diffstat (limited to 'arch/ppc/cpu/mpc8xx/cpu.c')
| -rw-r--r-- | arch/ppc/cpu/mpc8xx/cpu.c | 654 |
1 files changed, 0 insertions, 654 deletions
diff --git a/arch/ppc/cpu/mpc8xx/cpu.c b/arch/ppc/cpu/mpc8xx/cpu.c deleted file mode 100644 index 2eb848b..0000000 --- a/arch/ppc/cpu/mpc8xx/cpu.c +++ /dev/null @@ -1,654 +0,0 @@ -/* - * (C) Copyright 2000-2002 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * 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 - */ - -/* - * m8xx.c - * - * CPU specific code - * - * written or collected and sometimes rewritten by - * Magnus Damm <damm@bitsmart.com> - * - * minor modifications by - * Wolfgang Denk <wd@denx.de> - */ - -#include <common.h> -#include <watchdog.h> -#include <command.h> -#include <mpc8xx.h> -#include <commproc.h> -#include <netdev.h> -#include <asm/cache.h> - -#if defined(CONFIG_OF_LIBFDT) -#include <libfdt.h> -#include <libfdt_env.h> -#include <fdt_support.h> -#endif - -DECLARE_GLOBAL_DATA_PTR; - -static char *cpu_warning = "\n " \ - "*** Warning: CPU Core has Silicon Bugs -- Check the Errata ***"; - -#if ((defined(CONFIG_MPC86x) || defined(CONFIG_MPC855)) && \ - !defined(CONFIG_MPC862)) - -static int check_CPU (long clock, uint pvr, uint immr) -{ - char *id_str = -# if defined(CONFIG_MPC855) - "PC855"; -# elif defined(CONFIG_MPC860P) - "PC860P"; -# else - NULL; -# endif - volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000); - uint k, m; - char buf[32]; - char pre = 'X'; - char *mid = "xx"; - char *suf; - - /* the highest 16 bits should be 0x0050 for a 860 */ - - if ((pvr >> 16) != 0x0050) - return -1; - - k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]); - m = 0; - suf = ""; - - /* - * Some boards use sockets so different CPUs can be used. - * We have to check chip version in run time. - */ - switch (k) { - case 0x00020001: pre = 'P'; break; - case 0x00030001: break; - case 0x00120003: suf = "A"; break; - case 0x00130003: suf = "A3"; break; - - case 0x00200004: suf = "B"; break; - - case 0x00300004: suf = "C"; break; - case 0x00310004: suf = "C1"; m = 1; break; - - case 0x00200064: mid = "SR"; suf = "B"; break; - case 0x00300065: mid = "SR"; suf = "C"; break; - case 0x00310065: mid = "SR"; suf = "C1"; m = 1; break; - case 0x05010000: suf = "D3"; m = 1; break; - case 0x05020000: suf = "D4"; m = 1; break; - /* this value is not documented anywhere */ - case 0x40000000: pre = 'P'; suf = "D"; m = 1; break; - /* MPC866P/MPC866T/MPC859T/MPC859DSL/MPC852T */ - case 0x08010004: /* Rev. A.0 */ - suf = "A"; - /* fall through */ - case 0x08000003: /* Rev. 0.3 */ - pre = 'M'; m = 1; - if (id_str == NULL) - id_str = -# if defined(CONFIG_MPC852T) - "PC852T"; -# elif defined(CONFIG_MPC859T) - "PC859T"; -# elif defined(CONFIG_MPC859DSL) - "PC859DSL"; -# elif defined(CONFIG_MPC866T) - "PC866T"; -# else - "PC866x"; /* Unknown chip from MPC866 family */ -# endif - break; - case 0x09000000: pre = 'M'; mid = suf = ""; m = 1; - if (id_str == NULL) - id_str = "PC885"; /* 870/875/880/885 */ - break; - - default: suf = NULL; break; - } - - if (id_str == NULL) - id_str = "PC86x"; /* Unknown 86x chip */ - if (suf) - printf ("%c%s%sZPnn%s", pre, id_str, mid, suf); - else - printf ("unknown M%s (0x%08x)", id_str, k); - - -#if defined(CONFIG_SYS_8xx_CPUCLK_MIN) && defined(CONFIG_SYS_8xx_CPUCLK_MAX) - printf (" at %s MHz [%d.%d...%d.%d MHz]\n ", - strmhz (buf, clock), - CONFIG_SYS_8xx_CPUCLK_MIN / 1000000, - ((CONFIG_SYS_8xx_CPUCLK_MIN % 1000000) + 50000) / 100000, - CONFIG_SYS_8xx_CPUCLK_MAX / 1000000, - ((CONFIG_SYS_8xx_CPUCLK_MAX % 1000000) + 50000) / 100000 - ); -#else - printf (" at %s MHz: ", strmhz (buf, clock)); -#endif - printf ("%u kB I-Cache %u kB D-Cache", - checkicache () >> 10, - checkdcache () >> 10 - ); - - /* do we have a FEC (860T/P or 852/859/866/885)? */ - - immap->im_cpm.cp_fec.fec_addr_low = 0x12345678; - if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) { - printf (" FEC present"); - } - - if (!m) { - puts (cpu_warning); - } - - putc ('\n'); - -#ifdef DEBUG - if(clock != measure_gclk()) { - printf ("clock %ldHz != %dHz\n", clock, measure_gclk()); - } -#endif - - return 0; -} - -#elif defined(CONFIG_MPC862) - -static int check_CPU (long clock, uint pvr, uint immr) -{ - volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000); - uint k, m; - char buf[32]; - char pre = 'X'; - char *mid = "xx"; - char *suf; - - /* the highest 16 bits should be 0x0050 for a 8xx */ - - if ((pvr >> 16) != 0x0050) - return -1; - - k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]); - m = 0; - - switch (k) { - - /* this value is not documented anywhere */ - case 0x06000000: mid = "P"; suf = "0"; break; - case 0x06010001: mid = "P"; suf = "A"; m = 1; break; - case 0x07000003: mid = "P"; suf = "B"; m = 1; break; - default: suf = NULL; break; - } - -#ifndef CONFIG_MPC857 - if (suf) - printf ("%cPC862%sZPnn%s", pre, mid, suf); - else - printf ("unknown MPC862 (0x%08x)", k); -#else - if (suf) - printf ("%cPC857TZPnn%s", pre, suf); /* only 857T tested right now! */ - else - printf ("unknown MPC857 (0x%08x)", k); -#endif - - printf (" at %s MHz:", strmhz (buf, clock)); - - printf (" %u kB I-Cache", checkicache () >> 10); - printf (" %u kB D-Cache", checkdcache () >> 10); - - /* lets check and see if we're running on a 862T (or P?) */ - - immap->im_cpm.cp_fec.fec_addr_low = 0x12345678; - if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) { - printf (" FEC present"); - } - - if (!m) { - puts (cpu_warning); - } - - putc ('\n'); - - return 0; -} - -#elif defined(CONFIG_MPC823) - -static int check_CPU (long clock, uint pvr, uint immr) -{ - volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000); - uint k, m; - char buf[32]; - char *suf; - - /* the highest 16 bits should be 0x0050 for a 8xx */ - - if ((pvr >> 16) != 0x0050) - return -1; - - k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]); - m = 0; - - switch (k) { - /* MPC823 */ - case 0x20000000: suf = "0"; break; - case 0x20010000: suf = "0.1"; break; - case 0x20020000: suf = "Z2/3"; break; - case 0x20020001: suf = "Z3"; break; - case 0x21000000: suf = "A"; break; - case 0x21010000: suf = "B"; m = 1; break; - case 0x21010001: suf = "B2"; m = 1; break; - /* MPC823E */ - case 0x24010000: suf = NULL; - puts ("PPC823EZTnnB2"); - m = 1; - break; - default: - suf = NULL; - printf ("unknown MPC823 (0x%08x)", k); - break; - } - if (suf) - printf ("PPC823ZTnn%s", suf); - - printf (" at %s MHz:", strmhz (buf, clock)); - - printf (" %u kB I-Cache", checkicache () >> 10); - printf (" %u kB D-Cache", checkdcache () >> 10); - - /* lets check and see if we're running on a 860T (or P?) */ - - immap->im_cpm.cp_fec.fec_addr_low = 0x12345678; - if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) { - puts (" FEC present"); - } - - if (!m) { - puts (cpu_warning); - } - - putc ('\n'); - - return 0; -} - -#elif defined(CONFIG_MPC850) - -static int check_CPU (long clock, uint pvr, uint immr) -{ - volatile immap_t *immap = (immap_t *) (immr & 0xFFFF0000); - uint k, m; - char buf[32]; - - /* the highest 16 bits should be 0x0050 for a 8xx */ - - if ((pvr >> 16) != 0x0050) - return -1; - - k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]); - m = 0; - - switch (k) { - case 0x20020001: - printf ("XPC850xxZT"); - break; - case 0x21000065: - printf ("XPC850xxZTA"); - break; - case 0x21010067: - printf ("XPC850xxZTB"); - m = 1; - break; - case 0x21020068: - printf ("XPC850xxZTC"); - m = 1; - break; - default: - printf ("unknown MPC850 (0x%08x)", k); - } - printf (" at %s MHz:", strmhz (buf, clock)); - - printf (" %u kB I-Cache", checkicache () >> 10); - printf (" %u kB D-Cache", checkdcache () >> 10); - - /* lets check and see if we're running on a 850T (or P?) */ - - immap->im_cpm.cp_fec.fec_addr_low = 0x12345678; - if (immap->im_cpm.cp_fec.fec_addr_low == 0x12345678) { - printf (" FEC present"); - } - - if (!m) { - puts (cpu_warning); - } - - putc ('\n'); - - return 0; -} -#else -#error CPU undefined -#endif -/* ------------------------------------------------------------------------- */ - -int checkcpu (void) -{ - ulong clock = gd->cpu_clk; - uint immr = get_immr (0); /* Return full IMMR contents */ - uint pvr = get_pvr (); - - puts ("CPU: "); - - /* 850 has PARTNUM 20 */ - /* 801 has PARTNUM 10 */ - return check_CPU (clock, pvr, immr); -} - -/* ------------------------------------------------------------------------- */ -/* L1 i-cache */ -/* the standard 860 has 128 sets of 16 bytes in 2 ways (= 4 kB) */ -/* the 860 P (plus) has 256 sets of 16 bytes in 4 ways (= 16 kB) */ - -int checkicache (void) -{ - volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; - volatile memctl8xx_t *memctl = &immap->im_memctl; - u32 cacheon = rd_ic_cst () & IDC_ENABLED; - -#ifdef CONFIG_IP86x - u32 k = memctl->memc_br1 & ~0x00007fff; /* probe in flash memoryarea */ -#else - u32 k = memctl->memc_br0 & ~0x00007fff; /* probe in flash memoryarea */ -#endif - u32 m; - u32 lines = -1; - - wr_ic_cst (IDC_UNALL); - wr_ic_cst (IDC_INVALL); - wr_ic_cst (IDC_DISABLE); - __asm__ volatile ("isync"); - - while (!((m = rd_ic_cst ()) & IDC_CERR2)) { - wr_ic_adr (k); - wr_ic_cst (IDC_LDLCK); - __asm__ volatile ("isync"); - - lines++; - k += 0x10; /* the number of bytes in a cacheline */ - } - - wr_ic_cst (IDC_UNALL); - wr_ic_cst (IDC_INVALL); - - if (cacheon) - wr_ic_cst (IDC_ENABLE); - else - wr_ic_cst (IDC_DISABLE); - - __asm__ volatile ("isync"); - - return lines << 4; -}; - -/* ------------------------------------------------------------------------- */ -/* L1 d-cache */ -/* the standard 860 has 128 sets of 16 bytes in 2 ways (= 4 kB) */ -/* the 860 P (plus) has 256 sets of 16 bytes in 2 ways (= 8 kB) */ -/* call with cache disabled */ - -int checkdcache (void) -{ - volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; - volatile memctl8xx_t *memctl = &immap->im_memctl; - u32 cacheon = rd_dc_cst () & IDC_ENABLED; - -#ifdef CONFIG_IP86x - u32 k = memctl->memc_br1 & ~0x00007fff; /* probe in flash memoryarea */ -#else - u32 k = memctl->memc_br0 & ~0x00007fff; /* probe in flash memoryarea */ -#endif - u32 m; - u32 lines = -1; - - wr_dc_cst (IDC_UNALL); - wr_dc_cst (IDC_INVALL); - wr_dc_cst (IDC_DISABLE); - - while (!((m = rd_dc_cst ()) & IDC_CERR2)) { - wr_dc_adr (k); - wr_dc_cst (IDC_LDLCK); - lines++; - k += 0x10; /* the number of bytes in a cacheline */ - } - - wr_dc_cst (IDC_UNALL); - wr_dc_cst (IDC_INVALL); - - if (cacheon) - wr_dc_cst (IDC_ENABLE); - else - wr_dc_cst (IDC_DISABLE); - - return lines << 4; -}; - -/* ------------------------------------------------------------------------- */ - -void upmconfig (uint upm, uint * table, uint size) -{ - uint i; - uint addr = 0; - volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; - volatile memctl8xx_t *memctl = &immap->im_memctl; - - for (i = 0; i < size; i++) { - memctl->memc_mdr = table[i]; /* (16-15) */ - memctl->memc_mcr = addr | upm; /* (16-16) */ - addr++; - } -} - -/* ------------------------------------------------------------------------- */ - -#ifndef CONFIG_LWMON - -int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) -{ - ulong msr, addr; - - volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; - - immap->im_clkrst.car_plprcr |= PLPRCR_CSR; /* Checkstop Reset enable */ - - /* Interrupts and MMU off */ - __asm__ volatile ("mtspr 81, 0"); - __asm__ volatile ("mfmsr %0":"=r" (msr)); - - msr &= ~0x1030; - __asm__ volatile ("mtmsr %0"::"r" (msr)); - - /* - * Trying to execute the next instruction at a non-existing address - * should cause a machine check, resulting in reset - */ -#ifdef CONFIG_SYS_RESET_ADDRESS - addr = CONFIG_SYS_RESET_ADDRESS; -#else - /* - * note: when CONFIG_SYS_MONITOR_BASE points to a RAM address, CONFIG_SYS_MONITOR_BASE - * - sizeof (ulong) is usually a valid address. Better pick an address - * known to be invalid on your system and assign it to CONFIG_SYS_RESET_ADDRESS. - * "(ulong)-1" used to be a good choice for many systems... - */ - addr = CONFIG_SYS_MONITOR_BASE - sizeof (ulong); -#endif - ((void (*)(void)) addr) (); - return 1; -} - -#else /* CONFIG_LWMON */ - -/* - * On the LWMON board, the MCLR reset input of the PIC's on the board - * uses a 47K/1n RC combination which has a 47us time constant. The - * low signal on the HRESET pin of the CPU is only 512 clocks = 8 us - * and thus too short to reset the external hardware. So we use the - * watchdog to reset the board. - */ -int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) -{ - /* prevent triggering the watchdog */ - disable_interrupts (); - - /* make sure the watchdog is running */ - reset_8xx_watchdog ((immap_t *) CONFIG_SYS_IMMR); - - /* wait for watchdog reset */ - while (1) {}; - - /* NOTREACHED */ - return 1; -} - -#endif /* CONFIG_LWMON */ - -/* ------------------------------------------------------------------------- */ - -/* - * Get timebase clock frequency (like cpu_clk in Hz) - * - * See sections 14.2 and 14.6 of the User's Manual - */ -unsigned long get_tbclk (void) -{ - uint immr = get_immr (0); /* Return full IMMR contents */ - volatile immap_t *immap = (volatile immap_t *)(immr & 0xFFFF0000); - ulong oscclk, factor, pll; - - if (immap->im_clkrst.car_sccr & SCCR_TBS) { - return (gd->cpu_clk / 16); - } - - pll = immap->im_clkrst.car_plprcr; - -#define PLPRCR_val(a) ((pll & PLPRCR_ ## a ## _MSK) >> PLPRCR_ ## a ## _SHIFT) - - /* - * For newer PQ1 chips (MPC866/87x/88x families), PLL multiplication - * factor is calculated as follows: - * - * MFN - * MFI + ------- - * MFD + 1 - * factor = ----------------- - * (PDF + 1) * 2^S - * - * For older chips, it's just MF field of PLPRCR plus one. - */ - if ((immr & 0x0FFF) >= MPC8xx_NEW_CLK) { /* MPC866/87x/88x series */ - factor = (PLPRCR_val(MFI) + PLPRCR_val(MFN)/(PLPRCR_val(MFD)+1))/ - (PLPRCR_val(PDF)+1) / (1<<PLPRCR_val(S)); - } else { - factor = PLPRCR_val(MF)+1; - } - - oscclk = gd->cpu_clk / factor; - - if ((immap->im_clkrst.car_sccr & SCCR_RTSEL) == 0 || factor > 2) { - return (oscclk / 4); - } - return (oscclk / 16); -} - -/* ------------------------------------------------------------------------- */ - -#if defined(CONFIG_WATCHDOG) -void watchdog_reset (void) -{ - int re_enable = disable_interrupts (); - - reset_8xx_watchdog ((immap_t *) CONFIG_SYS_IMMR); - if (re_enable) - enable_interrupts (); -} -#endif /* CONFIG_WATCHDOG */ - -#if defined(CONFIG_WATCHDOG) || defined(CONFIG_LWMON) - -void reset_8xx_watchdog (volatile immap_t * immr) -{ -# if defined(CONFIG_LWMON) - /* - * The LWMON board uses a MAX6301 Watchdog - * with the trigger pin connected to port PA.7 - * - * (The old board version used a MAX706TESA Watchdog, which - * had to be handled exactly the same.) - */ -# define WATCHDOG_BIT 0x0100 - immr->im_ioport.iop_papar &= ~(WATCHDOG_BIT); /* GPIO */ - immr->im_ioport.iop_padir |= WATCHDOG_BIT; /* Output */ - immr->im_ioport.iop_paodr &= ~(WATCHDOG_BIT); /* active output */ - - immr->im_ioport.iop_padat ^= WATCHDOG_BIT; /* Toggle WDI */ -# elif defined(CONFIG_KUP4K) || defined(CONFIG_KUP4X) - /* - * The KUP4 boards uses a TPS3705 Watchdog - * with the trigger pin connected to port PA.5 - */ -# define WATCHDOG_BIT 0x0400 - immr->im_ioport.iop_papar &= ~(WATCHDOG_BIT); /* GPIO */ - immr->im_ioport.iop_padir |= WATCHDOG_BIT; /* Output */ - immr->im_ioport.iop_paodr &= ~(WATCHDOG_BIT); /* active output */ - - immr->im_ioport.iop_padat ^= WATCHDOG_BIT; /* Toggle WDI */ -# else - /* - * All other boards use the MPC8xx Internal Watchdog - */ - immr->im_siu_conf.sc_swsr = 0x556c; /* write magic1 */ - immr->im_siu_conf.sc_swsr = 0xaa39; /* write magic2 */ -# endif /* CONFIG_LWMON */ -} -#endif /* CONFIG_WATCHDOG */ - -/* - * Initializes on-chip ethernet controllers. - * to override, implement board_eth_init() - */ -int cpu_eth_init(bd_t *bis) -{ -#if defined(SCC_ENET) && defined(CONFIG_CMD_NET) - scc_initialize(bis); -#endif -#if defined(FEC_ENET) - fec_initialize(bis); -#endif - return 0; -} |