diff options
author | TsiChungLiew <Tsi-Chung.Liew@freescale.com> | 2007-08-16 19:23:50 -0500 |
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committer | John Rigby <jrigby@freescale.com> | 2007-08-17 11:36:29 -0600 |
commit | 4a442d3186b31893b4f77c6e82f63c4517a5224b (patch) | |
tree | 7f0ad1c0464cbeeee6b3db4ccf9d7204d5d9819f /cpu | |
parent | 8ae158cd87a4a25722b27835261b6ff0fa2aa6a7 (diff) | |
download | bootable_bootloader_goldelico_gta04-4a442d3186b31893b4f77c6e82f63c4517a5224b.zip bootable_bootloader_goldelico_gta04-4a442d3186b31893b4f77c6e82f63c4517a5224b.tar.gz bootable_bootloader_goldelico_gta04-4a442d3186b31893b4f77c6e82f63c4517a5224b.tar.bz2 |
ColdFire: Add M5235EVB Platform for MCF523x
Signed-off-by: TsiChungLiew <Tsi-Chung.Liew@freescale.com>
Diffstat (limited to 'cpu')
-rw-r--r-- | cpu/mcf523x/Makefile | 48 | ||||
-rw-r--r-- | cpu/mcf523x/config.mk | 27 | ||||
-rw-r--r-- | cpu/mcf523x/cpu.c | 109 | ||||
-rw-r--r-- | cpu/mcf523x/cpu_init.c | 145 | ||||
-rw-r--r-- | cpu/mcf523x/interrupts.c | 49 | ||||
-rw-r--r-- | cpu/mcf523x/speed.c | 48 | ||||
-rw-r--r-- | cpu/mcf523x/start.S | 340 |
7 files changed, 766 insertions, 0 deletions
diff --git a/cpu/mcf523x/Makefile b/cpu/mcf523x/Makefile new file mode 100644 index 0000000..d0e9b45 --- /dev/null +++ b/cpu/mcf523x/Makefile @@ -0,0 +1,48 @@ +# +# (C) Copyright 2000-2004 +# 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 +# + +include $(TOPDIR)/config.mk + +# CFLAGS += -DET_DEBUG + +LIB = lib$(CPU).a + +START = start.o +COBJS = cpu.o speed.o cpu_init.o interrupts.o + +SRCS := $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c) +OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) +START := $(addprefix $(obj),$(START)) + +all: $(obj).depend $(START) $(LIB) + +$(LIB): $(OBJS) + $(AR) $(ARFLAGS) $@ $(OBJS) + +######################################################################### + +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +######################################################################### diff --git a/cpu/mcf523x/config.mk b/cpu/mcf523x/config.mk new file mode 100644 index 0000000..ba324a8 --- /dev/null +++ b/cpu/mcf523x/config.mk @@ -0,0 +1,27 @@ +# +# (C) Copyright 2003 Josef Baumgartner <josef.baumgartner@telex.de> +# +# (C) Copyright 2000-2004 +# 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 +# + +PLATFORM_RELFLAGS += -ffixed-d7 -msep-data +PLATFORM_CPPFLAGS += -m5307 -fPIC diff --git a/cpu/mcf523x/cpu.c b/cpu/mcf523x/cpu.c new file mode 100644 index 0000000..f0d954b --- /dev/null +++ b/cpu/mcf523x/cpu.c @@ -0,0 +1,109 @@ +/* + * + * (C) Copyright 2000-2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. + * TsiChung Liew (Tsi-Chung.Liew@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/immap.h> + +DECLARE_GLOBAL_DATA_PTR; + +int do_reset(cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char *argv[]) +{ + volatile ccm_t *ccm = (ccm_t *) MMAP_CCM; + + ccm->rcr = CCM_RCR_SOFTRST; + /* we don't return! */ + return 0; +}; + +int checkcpu(void) +{ + volatile ccm_t *ccm = (ccm_t *) MMAP_CCM; + u16 msk; + u16 id = 0; + u8 ver; + + puts("CPU: "); + msk = (ccm->cir >> 6); + ver = (ccm->cir & 0x003f); + switch (msk) { + case 0x31: + id = 5235; + break; + } + + if (id) { + printf("Freescale MCF%d (Mask:%01x Version:%x)\n", id, msk, + ver); + printf(" CPU CLK %d Mhz BUS CLK %d Mhz\n", + (int)(gd->cpu_clk / 1000000), + (int)(gd->bus_clk / 1000000)); + } + + return 0; +}; + +#if defined(CONFIG_WATCHDOG) +/* Called by macro WATCHDOG_RESET */ +void watchdog_reset(void) +{ + volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG); + + wdp->sr = 0x5555; /* Count register */ + asm("nop"); + wdp->sr = 0xAAAA; /* Count register */ +} + +int watchdog_disable(void) +{ + volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG); + + /* UserManual, once the wdog is disabled, wdog cannot be re-enabled */ + wdp->cr |= WTM_WCR_HALTED; /* halted watchdog timer */ + + puts("WATCHDOG:disabled\n"); + return (0); +} + +int watchdog_init(void) +{ + volatile wdog_t *wdp = (wdog_t *) (MMAP_WDOG); + u32 wdog_module = 0; + + /* set timeout and enable watchdog */ + wdog_module = ((CFG_CLK / CFG_HZ) * CONFIG_WATCHDOG_TIMEOUT); + wdog_module |= (wdog_module / 8192); + wdp->mr = wdog_module; + + wdp->cr = WTM_WCR_EN; + puts("WATCHDOG:enabled\n"); + + return (0); +} +#endif /* CONFIG_WATCHDOG */ diff --git a/cpu/mcf523x/cpu_init.c b/cpu/mcf523x/cpu_init.c new file mode 100644 index 0000000..a31054d --- /dev/null +++ b/cpu/mcf523x/cpu_init.c @@ -0,0 +1,145 @@ +/* + * + * (C) Copyright 2000-2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * (C) Copyright 2007 Freescale Semiconductor, Inc. + * TsiChung Liew (Tsi-Chung.Liew@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 <asm/immap.h> + +/* + * Breath some life into the CPU... + * + * Set up the memory map, + * initialize a bunch of registers, + * initialize the UPM's + */ +void cpu_init_f(void) +{ + volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO; + volatile fbcs_t *fbcs = (fbcs_t *) MMAP_FBCS; + volatile wdog_t *wdog = (wdog_t *) MMAP_WDOG; + volatile scm_t *scm = (scm_t *) MMAP_SCM; + + /* watchdog is enabled by default - disable the watchdog */ +#ifndef CONFIG_WATCHDOG + wdog->cr = 0; +#endif + + scm->rambar = (CFG_INIT_RAM_ADDR | SCM_RAMBAR_BDE); + + /* Port configuration */ + gpio->par_cs = 0; + +#if (defined(CFG_CS0_BASE) && defined(CFG_CS0_MASK) && defined(CFG_CS0_CTRL)) + fbcs->csar0 = CFG_CS0_BASE; + fbcs->cscr0 = CFG_CS0_CTRL; + fbcs->csmr0 = CFG_CS0_MASK; +#endif + +#if (defined(CFG_CS1_BASE) && defined(CFG_CS1_MASK) && defined(CFG_CS1_CTRL)) + gpio->par_cs |= GPIO_PAR_CS_CS1; + fbcs->csar1 = CFG_CS1_BASE; + fbcs->cscr1 = CFG_CS1_CTRL; + fbcs->csmr1 = CFG_CS1_MASK; +#endif + +#if (defined(CFG_CS2_BASE) && defined(CFG_CS2_MASK) && defined(CFG_CS2_CTRL)) + gpio->par_cs |= GPIO_PAR_CS_CS2; + fbcs->csar2 = CFG_CS2_BASE; + fbcs->cscr2 = CFG_CS2_CTRL; + fbcs->csmr2 = CFG_CS2_MASK; +#endif + +#if (defined(CFG_CS3_BASE) && defined(CFG_CS3_MASK) && defined(CFG_CS3_CTRL)) + gpio->par_cs |= GPIO_PAR_CS_CS3; + fbcs->csar3 = CFG_CS3_BASE; + fbcs->cscr3 = CFG_CS3_CTRL; + fbcs->csmr3 = CFG_CS3_MASK; +#endif + +#if (defined(CFG_CS4_BASE) && defined(CFG_CS4_MASK) && defined(CFG_CS4_CTRL)) + gpio->par_cs |= GPIO_PAR_CS_CS4; + fbcs->csar4 = CFG_CS4_BASE; + fbcs->cscr4 = CFG_CS4_CTRL; + fbcs->csmr4 = CFG_CS4_MASK; +#endif + +#if (defined(CFG_CS5_BASE) && defined(CFG_CS5_MASK) && defined(CFG_CS5_CTRL)) + gpio->par_cs |= GPIO_PAR_CS_CS5; + fbcs->csar5 = CFG_CS5_BASE; + fbcs->cscr5 = CFG_CS5_CTRL; + fbcs->csmr5 = CFG_CS5_MASK; +#endif + +#if (defined(CFG_CS6_BASE) && defined(CFG_CS6_MASK) && defined(CFG_CS6_CTRL)) + gpio->par_cs |= GPIO_PAR_CS_CS6; + fbcs->csar6 = CFG_CS6_BASE; + fbcs->cscr6 = CFG_CS6_CTRL; + fbcs->csmr6 = CFG_CS6_MASK; +#endif + +#if (defined(CFG_CS7_BASE) && defined(CFG_CS7_MASK) && defined(CFG_CS7_CTRL)) + gpio->par_cs |= GPIO_PAR_CS_CS7; + fbcs->csar7 = CFG_CS7_BASE; + fbcs->cscr7 = CFG_CS7_CTRL; + fbcs->csmr7 = CFG_CS7_MASK; +#endif + +#ifdef CONFIG_FSL_I2C + gpio->par_feci2c &= ~(GPIO_PAR_FECI2C_SCL_MASK | GPIO_PAR_FECI2C_SDA_MASK); + gpio->par_feci2c |= (GPIO_PAR_FECI2C_SCL_I2CSCL | GPIO_PAR_FECI2C_SDA_I2CSDA); +#endif + + icache_enable(); +} + +/* + * initialize higher level parts of CPU like timers + */ +int cpu_init_r(void) +{ + return (0); +} + +void uart_port_conf(void) +{ + volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO; + + /* Setup Ports: */ + switch (CFG_UART_PORT) { + case 0: + gpio->par_uart = (GPIO_PAR_UART_U0RXD | GPIO_PAR_UART_U0TXD); + break; + case 1: + gpio->par_uart = + (GPIO_PAR_UART_U1RXD_U1RXD | GPIO_PAR_UART_U1TXD_U1TXD); + break; + case 2: + gpio->par_timer = (GPIO_PAR_UART_U2RXD | GPIO_PAR_UART_U2TXD); + break; + } +} diff --git a/cpu/mcf523x/interrupts.c b/cpu/mcf523x/interrupts.c new file mode 100644 index 0000000..125c53b --- /dev/null +++ b/cpu/mcf523x/interrupts.c @@ -0,0 +1,49 @@ +/* + * + * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. + * TsiChung Liew (Tsi-Chung.Liew@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 + */ + +/* CPU specific interrupt routine */ +#include <common.h> +#include <asm/immap.h> + +int interrupt_init(void) +{ + volatile int0_t *intp = (int0_t *) (CFG_INTR_BASE); + + /* Make sure all interrupts are disabled */ + intp->imrl0 |= 0x1; + + enable_interrupts(); + return 0; +} + +#if defined(CONFIG_MCFTMR) +void dtimer_intr_setup(void) +{ + volatile int0_t *intp = (int0_t *) (CFG_INTR_BASE); + + intp->icr0[CFG_TMRINTR_NO] = CFG_TMRINTR_PRI; + intp->imrl0 &= ~INTC_IPRL_INT0; + intp->imrl0 &= ~CFG_TMRINTR_MASK; +} +#endif diff --git a/cpu/mcf523x/speed.c b/cpu/mcf523x/speed.c new file mode 100644 index 0000000..509109d --- /dev/null +++ b/cpu/mcf523x/speed.c @@ -0,0 +1,48 @@ +/* + * + * (C) Copyright 2000-2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. + * TsiChung Liew (Tsi-Chung.Liew@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 <asm/processor.h> + +#include <asm/immap.h> + +DECLARE_GLOBAL_DATA_PTR; +/* + * get_clocks() fills in gd->cpu_clock and gd->bus_clk + */ +int get_clocks(void) +{ + volatile pll_t *pll = (volatile pll_t *)(MMAP_PLL); + + pll->syncr = PLL_SYNCR_MFD(1); + + while (!(pll->synsr & PLL_SYNSR_LOCK)); + + gd->bus_clk = CFG_CLK; + gd->cpu_clk = (gd->bus_clk * 2); + return (0); +} diff --git a/cpu/mcf523x/start.S b/cpu/mcf523x/start.S new file mode 100644 index 0000000..2bd603d --- /dev/null +++ b/cpu/mcf523x/start.S @@ -0,0 +1,340 @@ +/* + * Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de> + * Based on code from Bernhard Kuhn <bkuhn@metrowerks.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 <config.h> +#include "version.h" + +#ifndef CONFIG_IDENT_STRING +#define CONFIG_IDENT_STRING "" +#endif + +#define _START _start +#define _FAULT _fault + +#define SAVE_ALL \ + move.w #0x2700,%sr; /* disable intrs */ \ + subl #60,%sp; /* space for 15 regs */ \ + moveml %d0-%d7/%a0-%a6,%sp@; + +#define RESTORE_ALL \ + moveml %sp@,%d0-%d7/%a0-%a6; \ + addl #60,%sp; /* space for 15 regs */ \ + rte; + +.text +/* + * Vector table. This is used for initial platform startup. + * These vectors are to catch any un-intended traps. + */ +_vectors: + +INITSP: .long 0x00000000 /* Initial SP */ +INITPC: .long _START /* Initial PC */ +vector02: .long _FAULT /* Access Error */ +vector03: .long _FAULT /* Address Error */ +vector04: .long _FAULT /* Illegal Instruction */ +vector05: .long _FAULT /* Reserved */ +vector06: .long _FAULT /* Reserved */ +vector07: .long _FAULT /* Reserved */ +vector08: .long _FAULT /* Privilege Violation */ +vector09: .long _FAULT /* Trace */ +vector0A: .long _FAULT /* Unimplemented A-Line */ +vector0B: .long _FAULT /* Unimplemented F-Line */ +vector0C: .long _FAULT /* Debug Interrupt */ +vector0D: .long _FAULT /* Reserved */ +vector0E: .long _FAULT /* Format Error */ +vector0F: .long _FAULT /* Unitialized Int. */ + +/* Reserved */ +vector10_17: +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT + +vector18: .long _FAULT /* Spurious Interrupt */ +vector19: .long _FAULT /* Autovector Level 1 */ +vector1A: .long _FAULT /* Autovector Level 2 */ +vector1B: .long _FAULT /* Autovector Level 3 */ +vector1C: .long _FAULT /* Autovector Level 4 */ +vector1D: .long _FAULT /* Autovector Level 5 */ +vector1E: .long _FAULT /* Autovector Level 6 */ +vector1F: .long _FAULT /* Autovector Level 7 */ + +/* TRAP #0 - #15 */ +vector20_2F: +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT + +/* Reserved */ +vector30_3F: +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT + +vector64_127: +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT + +vector128_191: +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT + +vector192_255: +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT +.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT + + .text + + .globl _start +_start: + nop + nop + move.w #0x2700,%sr /* Mask off Interrupt */ + + /* Set vector base register at the beginning of the Flash */ + move.l #CFG_FLASH_BASE, %d0 + movec %d0, %VBR + + move.l #(CFG_INIT_RAM_ADDR + CFG_INIT_RAM_CTRL), %d0 + movec %d0, %RAMBAR1 + + /* invalidate and disable cache */ + move.l #0x01000000, %d0 /* Invalidate cache cmd */ + movec %d0, %CACR /* Invalidate cache */ + nop + move.l #0, %d0 + movec %d0, %ACR0 + movec %d0, %ACR1 + + /* initialize general use internal ram */ + move.l #0, %d0 + move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1 + move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a2 + move.l %d0, (%a1) + move.l %d0, (%a2) + + /* set stackpointer to end of internal ram to get some stackspace for the + first c-code */ + move.l #(CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET), %sp + clr.l %sp@- + + move.l #__got_start, %a5 /* put relocation table address to a5 */ + + bsr cpu_init_f /* run low-level CPU init code (from flash) */ + bsr board_init_f /* run low-level board init code (from flash) */ + + /* board_init_f() does not return */ + +/*------------------------------------------------------------------------------*/ + +/* + * void relocate_code (addr_sp, gd, addr_moni) + * + * This "function" does not return, instead it continues in RAM + * after relocating the monitor code. + * + * r3 = dest + * r4 = src + * r5 = length in bytes + * r6 = cachelinesize + */ + .globl relocate_code +relocate_code: + link.w %a6,#0 + move.l 8(%a6), %sp /* set new stack pointer */ + + move.l 12(%a6), %d0 /* Save copy of Global Data pointer */ + move.l 16(%a6), %a0 /* Save copy of Destination Address */ + + move.l #CFG_MONITOR_BASE, %a1 + move.l #__init_end, %a2 + move.l %a0, %a3 + + /* copy the code to RAM */ +1: + move.l (%a1)+, (%a3)+ + cmp.l %a1,%a2 + bgt.s 1b + +/* + * We are done. Do not return, instead branch to second part of board + * initialization, now running from RAM. + */ + move.l %a0, %a1 + add.l #(in_ram - CFG_MONITOR_BASE), %a1 + jmp (%a1) + +in_ram: + +clear_bss: + /* + * Now clear BSS segment + */ + move.l %a0, %a1 + add.l #(_sbss - CFG_MONITOR_BASE),%a1 + move.l %a0, %d1 + add.l #(_ebss - CFG_MONITOR_BASE),%d1 +6: + clr.l (%a1)+ + cmp.l %a1,%d1 + bgt.s 6b + + /* + * fix got table in RAM + */ + move.l %a0, %a1 + add.l #(__got_start - CFG_MONITOR_BASE),%a1 + move.l %a1,%a5 /* * fix got pointer register a5 */ + + move.l %a0, %a2 + add.l #(__got_end - CFG_MONITOR_BASE),%a2 + +7: + move.l (%a1),%d1 + sub.l #_start,%d1 + add.l %a0,%d1 + move.l %d1,(%a1)+ + cmp.l %a2, %a1 + bne 7b + + /* calculate relative jump to board_init_r in ram */ + move.l %a0, %a1 + add.l #(board_init_r - CFG_MONITOR_BASE), %a1 + + /* set parameters for board_init_r */ + move.l %a0,-(%sp) /* dest_addr */ + move.l %d0,-(%sp) /* gd */ + jsr (%a1) + +/*------------------------------------------------------------------------------*/ +/* exception code */ + .globl _fault +_fault: + jmp _fault + .globl _exc_handler + +_exc_handler: + SAVE_ALL + movel %sp,%sp@- + bsr exc_handler + addql #4,%sp + RESTORE_ALL + + .globl _int_handler +_int_handler: + SAVE_ALL + movel %sp,%sp@- + bsr int_handler + addql #4,%sp + RESTORE_ALL + +/*------------------------------------------------------------------------------*/ +/* cache functions */ + .globl icache_enable +icache_enable: + move.l #0x01000000, %d0 /* Invalidate cache cmd */ + movec %d0, %CACR /* Invalidate cache */ + nop + move.l #(CFG_SDRAM_BASE + 0xc000), %d0 /* Setup cache mask */ + movec %d0, %ACR0 /* Enable cache */ + move.l #(CFG_FLASH_BASE + 0xc000), %d0 /* Setup cache mask */ + movec %d0, %ACR1 /* Enable cache */ + + move.l #0x80400100, %d0 /* Setup cache mask */ + movec %d0, %CACR /* Enable cache */ + nop + + move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1 + moveq #1, %d0 + move.l %d0, (%a1) + rts + + .globl icache_disable +icache_disable: + move.l #0x00000100, %d0 /* Setup cache mask */ + movec %d0, %CACR /* Disable cache */ + clr.l %d0 /* Setup cache mask */ + movec %d0, %ACR0 + movec %d0, %ACR1 + + move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1 + moveq #0, %d0 + move.l %d0, (%a1) + rts + + .globl icache_status +icache_status: + move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1 + move.l (%a1), %d0 + rts + + .globl icache_invalid +icache_invalid: + move.l #0x80600100, %d0 /* Setup cache mask */ + movec %d0, %CACR /* Enable cache */ + nop + rts + + .globl dcache_enable +dcache_enable: + move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a1 + moveq #1, %d0 + move.l %d0, (%a1) + rts + + /* No dcache, just a dummy function */ + .globl dcache_disable +dcache_disable: + move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a1 + moveq #0, %d0 + move.l %d0, (%a1) + rts + + .globl dcache_status +dcache_status: + move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a1 + move.l (%a1), %d0 + rts + +/*------------------------------------------------------------------------------*/ + + .globl version_string +version_string: + .ascii U_BOOT_VERSION + .ascii " (", __DATE__, " - ", __TIME__, ")" + .ascii CONFIG_IDENT_STRING, "\0" |