diff options
Diffstat (limited to 'cpu/mips')
| -rw-r--r-- | cpu/mips/Makefile | 44 | ||||
| -rw-r--r-- | cpu/mips/cache.S | 265 | ||||
| -rw-r--r-- | cpu/mips/config.mk | 25 | ||||
| -rw-r--r-- | cpu/mips/cpu.c | 41 | ||||
| -rw-r--r-- | cpu/mips/incaip_clock.c | 107 | ||||
| -rw-r--r-- | cpu/mips/incaip_wdt.S | 73 | ||||
| -rw-r--r-- | cpu/mips/interrupts.c | 34 | ||||
| -rw-r--r-- | cpu/mips/serial.c | 282 | ||||
| -rw-r--r-- | cpu/mips/serial.h | 178 | ||||
| -rw-r--r-- | cpu/mips/start.S | 350 |
10 files changed, 1399 insertions, 0 deletions
diff --git a/cpu/mips/Makefile b/cpu/mips/Makefile new file mode 100644 index 000000000..91008bfe1 --- /dev/null +++ b/cpu/mips/Makefile @@ -0,0 +1,44 @@ +# +# (C) Copyright 2003 +# 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 $(TOPDIR)/config.mk + +LIB = lib$(CPU).a + +START = start.o +OBJS = interrupts.o cpu.o incaip_clock.o serial.o +SOBJS = incaip_wdt.o cache.o + +all: .depend $(START) $(LIB) + +$(LIB): $(OBJS) $(SOBJS) + $(AR) crv $@ $(OBJS) $(SOBJS) + +######################################################################### + +.depend: Makefile $(START:.o=.S) $(OBJS:.o=.c) + $(CC) -M $(CFLAGS) $(START:.o=.S) $(OBJS:.o=.c) > $@ + +sinclude .depend + +######################################################################### diff --git a/cpu/mips/cache.S b/cpu/mips/cache.S new file mode 100644 index 000000000..aeb04b379 --- /dev/null +++ b/cpu/mips/cache.S @@ -0,0 +1,265 @@ +/* + * Cache-handling routined for MIPS 4K CPUs + * + * Copyright (c) 2003 Wolfgang Denk <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 <config.h> +#include <version.h> +#include <asm/regdef.h> +#include <asm/mipsregs.h> +#include <asm/addrspace.h> +#include <asm/cacheops.h> + + + /* 16KB is the maximum size of instruction and data caches on + * MIPS 4K. + */ +#define MIPS_MAX_CACHE_SIZE 0x4000 + + +/* + * cacheop macro to automate cache operations + * first some helpers... + */ +#define _mincache(size, maxsize) \ + bltu size,maxsize,9f ; \ + move size,maxsize ; \ +9: + +#define _align(minaddr, maxaddr, linesize) \ + .set noat ; \ + subu AT,linesize,1 ; \ + not AT ; \ + and minaddr,AT ; \ + addu maxaddr,-1 ; \ + and maxaddr,AT ; \ + .set at + +/* general operations */ +#define doop1(op1) \ + cache op1,0(a0) +#define doop2(op1, op2) \ + cache op1,0(a0) ; \ + nop ; \ + cache op2,0(a0) + +/* specials for cache initialisation */ +#define doop1lw(op1) \ + lw zero,0(a0) +#define doop1lw1(op1) \ + cache op1,0(a0) ; \ + lw zero,0(a0) ; \ + cache op1,0(a0) +#define doop121(op1,op2) \ + cache op1,0(a0) ; \ + nop; \ + cache op2,0(a0) ; \ + nop; \ + cache op1,0(a0) + +#define _oploopn(minaddr, maxaddr, linesize, tag, ops) \ + .set noreorder ; \ +10: doop##tag##ops ; \ + bne minaddr,maxaddr,10b ; \ + add minaddr,linesize ; \ + .set reorder + +/* finally the cache operation macros */ +#define vcacheopn(kva, n, cacheSize, cacheLineSize, tag, ops) \ + blez n,11f ; \ + addu n,kva ; \ + _align(kva, n, cacheLineSize) ; \ + _oploopn(kva, n, cacheLineSize, tag, ops) ; \ +11: + +#define icacheopn(kva, n, cacheSize, cacheLineSize, tag, ops) \ + _mincache(n, cacheSize); \ + blez n,11f ; \ + addu n,kva ; \ + _align(kva, n, cacheLineSize) ; \ + _oploopn(kva, n, cacheLineSize, tag, ops) ; \ +11: + +#define vcacheop(kva, n, cacheSize, cacheLineSize, op) \ + vcacheopn(kva, n, cacheSize, cacheLineSize, 1, (op)) + +#define icacheop(kva, n, cacheSize, cacheLineSize, op) \ + icacheopn(kva, n, cacheSize, cacheLineSize, 1, (op)) + +/******************************************************************************* +* +* mips_cache_reset - low level initialisation of the primary caches +* +* This routine initialises the primary caches to ensure that they +* have good parity. It must be called by the ROM before any cached locations +* are used to prevent the possibility of data with bad parity being written to +* memory. +* To initialise the instruction cache it is essential that a source of data +* with good parity is available. This routine +* will initialise an area of memory starting at location zero to be used as +* a source of parity. +* +* RETURNS: N/A +* +*/ + .globl mips_cache_reset + .ent mips_cache_reset +mips_cache_reset: + + li t2, CFG_ICACHE_SIZE + li t3, CFG_DCACHE_SIZE + li t4, CFG_CACHELINE_SIZE + move t5, t4 + + + li v0, MIPS_MAX_CACHE_SIZE + + /* Now clear that much memory starting from zero. + */ + + li a0, KSEG1 + addu a1, a0, v0 + +2: sw zero, 0(a0) + sw zero, 4(a0) + sw zero, 8(a0) + sw zero, 12(a0) + sw zero, 16(a0) + sw zero, 20(a0) + sw zero, 24(a0) + sw zero, 28(a0) + addu a0, 32 + bltu a0, a1, 2b + + /* Set invalid tag. + */ + + mtc0 zero, CP0_TAGLO + + /* + * The caches are probably in an indeterminate state, + * so we force good parity into them by doing an + * invalidate, load/fill, invalidate for each line. + */ + + /* Assume bottom of RAM will generate good parity for the cache. + */ + + li a0, K0BASE + move a2, t2 # icacheSize + move a3, t4 # icacheLineSize + move a1, a2 + icacheopn(a0,a1,a2,a3,121,(Index_Store_Tag_I,Fill)) + + /* To support Orion/R4600, we initialise the data cache in 3 passes. + */ + + /* 1: initialise dcache tags. + */ + + li a0, K0BASE + move a2, t3 # dcacheSize + move a3, t5 # dcacheLineSize + move a1, a2 + icacheop(a0,a1,a2,a3,Index_Store_Tag_D) + + /* 2: fill dcache. + */ + + li a0, K0BASE + move a2, t3 # dcacheSize + move a3, t5 # dcacheLineSize + move a1, a2 + icacheopn(a0,a1,a2,a3,1lw,(dummy)) + + /* 3: clear dcache tags. + */ + + li a0, K0BASE + move a2, t3 # dcacheSize + move a3, t5 # dcacheLineSize + move a1, a2 + icacheop(a0,a1,a2,a3,Index_Store_Tag_D) + + j ra + .end mips_cache_reset + + +/******************************************************************************* +* +* dcache_status - get cache status +* +* RETURNS: 0 - cache disabled; 1 - cache enabled +* +*/ + .globl dcache_status + .ent dcache_status +dcache_status: + + mfc0 v0, CP0_CONFIG + andi v0, v0, 1 + j ra + + .end dcache_status + +/******************************************************************************* +* +* dcache_disable - disable cache +* +* RETURNS: N/A +* +*/ + .globl dcache_disable + .ent dcache_disable +dcache_disable: + + mfc0 t0, CP0_CONFIG + li t1, -8 + and t0, t0, t1 + ori t0, t0, CONF_CM_UNCACHED + mtc0 t0, CP0_CONFIG + j ra + + .end dcache_disable + + +/******************************************************************************* +* +* mips_cache_lock - lock RAM area pointed to by a0 in cache. +* +* RETURNS: N/A +* +*/ + .globl mips_cache_lock + .ent mips_cache_lock +mips_cache_lock: + li a1, K0BASE - CFG_DCACHE_SIZE + addu a0, a1 + li a2, CFG_DCACHE_SIZE + li a3, CFG_CACHELINE_SIZE + move a1, a2 + icacheop(a0,a1,a2,a3,0x1d) + + j ra + .end mips_cache_lock + diff --git a/cpu/mips/config.mk b/cpu/mips/config.mk new file mode 100644 index 000000000..4ea66172d --- /dev/null +++ b/cpu/mips/config.mk @@ -0,0 +1,25 @@ +# +# (C) Copyright 2003 +# 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_CPPFLAGS += -mcpu=4kc -EB -mabicalls + diff --git a/cpu/mips/cpu.c b/cpu/mips/cpu.c new file mode 100644 index 000000000..3fc3916b4 --- /dev/null +++ b/cpu/mips/cpu.c @@ -0,0 +1,41 @@ +/* + * (C) Copyright 2003 + * 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 <common.h> +#include <command.h> +#include <asm/inca-ip.h> + +int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ +#ifdef CONFIG_INCA_IP + *INCA_IP_WDT_RST_REQ = 0x3f; +#endif + fprintf(stderr, "*** reset failed ***\n"); + return 0; +} + +void flush_cache (ulong start_addr, ulong size) +{ + +} + diff --git a/cpu/mips/incaip_clock.c b/cpu/mips/incaip_clock.c new file mode 100644 index 000000000..7fc6eb035 --- /dev/null +++ b/cpu/mips/incaip_clock.c @@ -0,0 +1,107 @@ +/* + * (C) Copyright 2003 + * 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 <common.h> +#include <asm/inca-ip.h> + + + +/******************************************************************************* +* +* get_cpuclk - returns the frequency of the CPU. +* +* Gets the value directly from the INCA-IP hardware. +* +* RETURNS: +* 150.000.000 for 150 MHz +* 130.000.000. for 130 Mhz +* 100.000.000. for 100 Mhz +* NOTE: +* This functions should be used by the hardware driver to get the correct +* frequency of the CPU. Don't use the macros, which are set to init the CPU +* frequency in the ROM code. +*/ +uint incaip_get_cpuclk(void) +{ + /*-------------------------------------------------------------------------*/ + /* CPU Clock Input Multiplexer (MUX I) */ + /* Multiplexer MUX I selects the maximum input clock to the CPU. */ + /*-------------------------------------------------------------------------*/ + if (*((volatile ulong*)INCA_IP_CGU_CGU_MUXCR) & INCA_IP_CGU_CGU_MUXCR_MUXI) + { + /* MUX I set to 150 MHz clock */ + return 150000000; + } + else + { + /* MUX I set to 100/133 MHz clock */ + if (*((volatile ulong*)INCA_IP_CGU_CGU_DIVCR) & 0x40) + { + /* Division value is 1/3, maximum CPU operating */ + /* frequency is 133.3 MHz */ + return 130000000; + } + else + { + /* Division value is 1/4, maximum CPU operating */ + /* frequency is 100 MHz */ + return 100000000; + } + } +} + +/******************************************************************************* +* +* get_fpiclk - returns the frequency of the FPI bus. +* +* Gets the value directly from the INCA-IP hardware. +* +* RETURNS: Frquency in Hz +* +* NOTE: +* This functions should be used by the hardware driver to get the correct +* frequency of the CPU. Don't use the macros, which are set to init the CPU +* frequency in the ROM code. +* The calculation for the +*/ +uint incaip_get_fpiclk(void) +{ + uint clkCPU; + + clkCPU = incaip_get_cpuclk(); + + switch (*((volatile ulong*)INCA_IP_CGU_CGU_DIVCR) & 0xC) + { + case 0x4: + return clkCPU >> 1; /* devided by 2 */ + break; + case 0x8: + return clkCPU >> 2; /* devided by 4 */ + break; + default: + return clkCPU; + break; + } +} + + diff --git a/cpu/mips/incaip_wdt.S b/cpu/mips/incaip_wdt.S new file mode 100644 index 000000000..9455569f5 --- /dev/null +++ b/cpu/mips/incaip_wdt.S @@ -0,0 +1,73 @@ +/* + * INCA-IP Watchdog timer management code. + * + * Copyright (c) 2003 Wolfgang Denk <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 <config.h> +#include <version.h> +#include <asm/regdef.h> + + +#define WD_BASE 0xb8000000 +#define WD_CON0(value) 0x0020(value) +#define WD_CON1(value) 0x0024(value) +#define WD_DISABLE 0x00000008 +#define WD_ENABLE 0x00000000 +#define WD_WRITE_PW 0xFFFC00F8 +#define WD_WRITE_ENDINIT 0xFFFC00F3 +#define WD_WRITE_INIT 0xFFFC00F2 + + + .globl disable_incaip_wdt +disable_incaip_wdt: + li t0, WD_BASE + + /* Calculate password. + */ + lw t2, WD_CON1(t0) + and t2, 0xC + + lw t3, WD_CON0(t0) + and t3, 0xFFFFFF01 + + or t3, t2 + or t3, 0xF0 + + sw t3, WD_CON0(t0) /* write password */ + + /* Clear ENDINIT. + */ + li t1, WD_WRITE_INIT + sw t1, WD_CON0(t0) + + + li t1, WD_DISABLE + sw t1, WD_CON1(t0) /* disable watchdog */ + li t1, WD_WRITE_PW + sw t1, WD_CON0(t0) /* write password */ + li t1, WD_WRITE_ENDINIT + sw t1, WD_CON0(t0) /* end command */ + + j ra + nop + diff --git a/cpu/mips/interrupts.c b/cpu/mips/interrupts.c new file mode 100644 index 000000000..0490a7661 --- /dev/null +++ b/cpu/mips/interrupts.c @@ -0,0 +1,34 @@ +/* + * (C) Copyright 2003 + * 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 <common.h> + +void enable_interrupts(void) +{ +} + +int disable_interrupts(void) +{ + return 0; +} + diff --git a/cpu/mips/serial.c b/cpu/mips/serial.c new file mode 100644 index 000000000..ebda509b1 --- /dev/null +++ b/cpu/mips/serial.c @@ -0,0 +1,282 @@ +/* + * (INCA) ASC UART support + */ + +#include <common.h> +#include <asm/inca-ip.h> +#include "serial.h" + +#define SET_BIT(reg, mask) reg |= (mask) +#define CLEAR_BIT(reg, mask) reg &= (~mask) +#define CLEAR_BITS(reg, mask) CLEAR_BIT(reg, mask) +#define SET_BITS(reg, mask) SET_BIT(reg, mask) +#define SET_BITFIELD(reg, mask, off, val) {reg &= (~mask); reg |= (val << off);} + +extern uint incaip_get_fpiclk(void); + +static int serial_setopt (void); + +/* pointer to ASC register base address */ +static volatile incaAsc_t *pAsc = (incaAsc_t *)INCA_IP_ASC; + +/****************************************************************************** +* +* serial_init - initialize a INCAASC channel +* +* This routine initializes the number of data bits, parity +* and set the selected baud rate. Interrupts are disabled. +* Set the modem control signals if the option is selected. +* +* RETURNS: N/A +*/ + +int serial_init (void) +{ + /* we have to set PMU.EN13 bit to enable an ASC device*/ + INCAASC_PMU_ENABLE(13); + + /* and we have to set CLC register*/ + CLEAR_BIT(pAsc->asc_clc, ASCCLC_DISS); + SET_BITFIELD(pAsc->asc_clc, ASCCLC_RMCMASK, ASCCLC_RMCOFFSET, 0x0001); + + /* initialy we are in async mode */ + pAsc->asc_con = ASCCON_M_8ASYNC; + + /* select input port */ + pAsc->asc_pisel = (CONSOLE_TTY & 0x1); + + /* TXFIFO's filling level */ + SET_BITFIELD(pAsc->asc_txfcon, ASCTXFCON_TXFITLMASK, + ASCTXFCON_TXFITLOFF, INCAASC_TXFIFO_FL); + /* enable TXFIFO */ + SET_BIT(pAsc->asc_txfcon, ASCTXFCON_TXFEN); + + /* RXFIFO's filling level */ + SET_BITFIELD(pAsc->asc_txfcon, ASCRXFCON_RXFITLMASK, + ASCRXFCON_RXFITLOFF, INCAASC_RXFIFO_FL); + /* enable RXFIFO */ + SET_BIT(pAsc->asc_rxfcon, ASCRXFCON_RXFEN); + + /* enable error signals */ + SET_BIT(pAsc->asc_con, ASCCON_FEN); + SET_BIT(pAsc->asc_con, ASCCON_OEN); + + /* acknowledge ASC interrupts */ + ASC_INTERRUPTS_CLEAR(INCAASC_IRQ_LINE_ALL); + + /* disable ASC interrupts */ + ASC_INTERRUPTS_DISABLE(INCAASC_IRQ_LINE_ALL); + + /* set FIFOs into the transparent mode */ + SET_BIT(pAsc->asc_txfcon, ASCTXFCON_TXTMEN); + SET_BIT(pAsc->asc_rxfcon, ASCRXFCON_RXTMEN); + + /* set baud rate */ + serial_setbrg(); + + /* set the options */ + serial_setopt(); + + return 0; +} + +void serial_setbrg (void) +{ + ulong uiReloadValue, fdv; + ulong f_ASC; + + f_ASC = incaip_get_fpiclk(); + +#ifndef INCAASC_USE_FDV + fdv = 2; + uiReloadValue = (f_ASC / (fdv * 16 * CONFIG_BAUDRATE)) - 1; +#else + fdv = INCAASC_FDV_HIGH_BAUDRATE; + uiReloadValue = (f_ASC / (8192 * CONFIG_BAUDRATE / fdv)) - 1; +#endif /* INCAASC_USE_FDV */ + + if ( (uiReloadValue < 0) || (uiReloadValue > 8191) ) + { +#ifndef INCAASC_USE_FDV + fdv = 3; + uiReloadValue = (f_ASC / (fdv * 16 * CONFIG_BAUDRATE)) - 1; +#else + fdv = INCAASC_FDV_LOW_BAUDRATE; + uiReloadValue = (f_ASC / (8192 * CONFIG_BAUDRATE / fdv)) - 1; +#endif /* INCAASC_USE_FDV */ + + if ( (uiReloadValue < 0) || (uiReloadValue > 8191) ) + { + return; /* can't impossibly generate that baud rate */ + } + } + + /* Disable Baud Rate Generator; BG should only be written when R=0 */ + CLEAR_BIT(pAsc->asc_con, ASCCON_R); + +#ifndef INCAASC_USE_FDV + /* + * Disable Fractional Divider (FDE) + * Divide clock by reload-value + constant (BRS) + */ + /* FDE = 0 */ + CLEAR_BIT(pAsc->asc_con, ASCCON_FDE); + + if ( fdv == 2 ) + CLEAR_BIT(pAsc->asc_con, ASCCON_BRS); /* BRS = 0 */ + else + SET_BIT(pAsc->asc_con, ASCCON_BRS); /* BRS = 1 */ + +#else /* INCAASC_USE_FDV */ + + /* Enable Fractional Divider */ + SET_BIT(pAsc->asc_con, ASCCON_FDE); /* FDE = 1 */ + + /* Set fractional divider value */ + pAsc->asc_fdv = fdv & ASCFDV_VALUE_MASK; + +#endif /* INCAASC_USE_FDV */ + + /* Set reload value in BG */ + pAsc->asc_bg = uiReloadValue; + + /* Enable Baud Rate Generator */ + SET_BIT(pAsc->asc_con, ASCCON_R); /* R = 1 */ +} + +/******************************************************************************* +* +* serial_setopt - set the serial options +* +* Set the channel operating mode to that specified. Following options +* are supported: CREAD, CSIZE, PARENB, and PARODD. +* +* Note, this routine disables the transmitter. The calling routine +* may have to re-enable it. +* +* RETURNS: +* Returns 0 to indicate success, otherwise -1 is returned +*/ + +static int serial_setopt (void) +{ + ulong con; + + switch ( ASC_OPTIONS & ASCOPT_CSIZE ) + { + /* 7-bit-data */ + case ASCOPT_CS7: + con = ASCCON_M_7ASYNCPAR; /* 7-bit-data and parity bit */ + break; + + /* 8-bit-data */ + case ASCOPT_CS8: + if ( ASC_OPTIONS & ASCOPT_PARENB ) + con = ASCCON_M_8ASYNCPAR; /* 8-bit-data and parity bit */ + else + con = ASCCON_M_8ASYNC; /* 8-bit-data no parity */ + break; + + /* + * only 7 and 8-bit frames are supported + * if we don't use IOCTL extensions + */ + default: + return -1; + } + + if ( ASC_OPTIONS & ASCOPT_STOPB ) + SET_BIT(con, ASCCON_STP); /* 2 stop bits */ + else + CLEAR_BIT(con, ASCCON_STP); /* 1 stop bit */ + + if ( ASC_OPTIONS & ASCOPT_PARENB ) + SET_BIT(con, ASCCON_PEN); /* enable parity checking */ + else + CLEAR_BIT(con, ASCCON_PEN); /* disable parity checking */ + + if ( ASC_OPTIONS & ASCOPT_PARODD ) + SET_BIT(con, ASCCON_ODD); /* odd parity */ + else + CLEAR_BIT(con, ASCCON_ODD); /* even parity */ + + if ( ASC_OPTIONS & ASCOPT_CREAD ) + SET_BIT(pAsc->asc_whbcon, ASCWHBCON_SETREN); /* Receiver enable */ + + pAsc->asc_con |= con; + + return 0; +} + +void serial_putc (const char c) +{ + uint txFl = 0; + + if (c == '\n') serial_putc ('\r'); + + /* check do we have a free space in the TX FIFO */ + /* get current filling level */ + do + { + txFl = ( pAsc->asc_fstat & ASCFSTAT_TXFFLMASK ) >> ASCFSTAT_TXFFLOFF; + } + while ( txFl == INCAASC_TXFIFO_FULL ); + + pAsc->asc_tbuf = c; /* write char to Transmit Buffer Register */ + /* check for errors */ + if ( pAsc->asc_con & ASCCON_OE ) + { + SET_BIT(pAsc->asc_whbcon, ASCWHBCON_CLROE); + return; + } +} + +void serial_puts (const char *s) +{ + while (*s) + { + serial_putc (*s++); + } +} + +int serial_getc (void) +{ + ulong symbol_mask; + char c; + + while (!serial_tstc()); + + symbol_mask = + ((ASC_OPTIONS & ASCOPT_CSIZE) == ASCOPT_CS7) ? (0x7f) : (0xff); + + c = (char)(pAsc->asc_rbuf & symbol_mask); + + return c; +} + +int serial_tstc (void) +{ + int res = 1; + + if ( (pAsc->asc_fstat & ASCFSTAT_RXFFLMASK) == 0 ) + { + res = 0; + } + else if ( pAsc->asc_con & ASCCON_FE ) + { + SET_BIT(pAsc->asc_whbcon, ASCWHBCON_CLRFE); + res = 0; + } + else if ( pAsc->asc_con & ASCCON_PE ) + { + SET_BIT(pAsc->asc_whbcon, ASCWHBCON_CLRPE); + res = 0; + } + else if ( pAsc->asc_con & ASCCON_OE ) + { + SET_BIT(pAsc->asc_whbcon, ASCWHBCON_CLROE); + res = 0; + } + + return res; +} diff --git a/cpu/mips/serial.h b/cpu/mips/serial.h new file mode 100644 index 000000000..ee63360e6 --- /dev/null +++ b/cpu/mips/serial.h @@ -0,0 +1,178 @@ +/* incaAscSio.h - (INCA) ASC UART tty driver header */ + +#ifndef __INCincaAscSioh +#define __INCincaAscSioh + +#include <asm/inca-ip.h> + +/* channel operating modes */ +#define ASCOPT_CSIZE 0x00000003 +#define ASCOPT_CS7 0x00000001 +#define ASCOPT_CS8 0x00000002 +#define ASCOPT_PARENB 0x00000004 +#define ASCOPT_STOPB 0x00000008 +#define ASCOPT_PARODD 0x00000010 +#define ASCOPT_CREAD 0x00000020 + +#define ASC_OPTIONS (ASCOPT_CREAD | ASCOPT_CS8) + +/* ASC input select (0 or 1) */ +#define CONSOLE_TTY 0 + +/* use fractional divider for baudrate settings */ +#define INCAASC_USE_FDV + +#ifdef INCAASC_USE_FDV + #define INCAASC_FDV_LOW_BAUDRATE 71 + #define INCAASC_FDV_HIGH_BAUDRATE 453 +#endif /*INCAASC_USE_FDV*/ + + +#define INCAASC_TXFIFO_FL 1 +#define INCAASC_RXFIFO_FL 1 +#define INCAASC_TXFIFO_FULL 16 + +/* interrupt lines masks for the ASC device interrupts*/ +/* change these macroses if it's necessary */ +#define INCAASC_IRQ_LINE_ALL 0x000F0000 /* all IRQs */ + +#define INCAASC_IRQ_LINE_TIR 0x00010000 /* TIR - Tx */ +#define INCAASC_IRQ_LINE_RIR 0x00020000 /* RIR - Rx */ +#define INCAASC_IRQ_LINE_EIR 0x00040000 /* EIR - Err */ +#define INCAASC_IRQ_LINE_TBIR 0x00080000 /* TBIR - Tx Buf*/ + +/* interrupt controller access macros */ +#define ASC_INTERRUPTS_ENABLE(X) \ + *((volatile unsigned int*) INCA_IP_ICU_IM2_IER) |= X; +#define ASC_INTERRUPTS_DISABLE(X) \ + *((volatile unsigned int*) INCA_IP_ICU_IM2_IER) &= ~X; +#define ASC_INTERRUPTS_CLEAR(X) \ + *((volatile unsigned int*) INCA_IP_ICU_IM2_ISR) = X; + +/* CLC register's bits and bitfields */ +#define ASCCLC_DISR 0x00000001 +#define ASCCLC_DISS 0x00000002 +#define ASCCLC_RMCMASK 0x0000FF00 +#define ASCCLC_RMCOFFSET 8 + +/* CON register's bits and bitfields */ +#define ASCCON_MODEMASK 0x0007 + #define ASCCON_M_8SYNC 0x0 + #define ASCCON_M_8ASYNC 0x1 + #define ASCCON_M_8IRDAASYNC 0x2 + #define ASCCON_M_7ASYNCPAR 0x3 + #define ASCCON_M_9ASYNC 0x4 + #define ASCCON_M_8WAKEUPASYNC 0x5 + #define ASCCON_M_8ASYNCPAR 0x7 +#define ASCCON_STP 0x0008 +#define ASCCON_REN 0x0010 +#define ASCCON_PEN 0x0020 +#define ASCCON_FEN 0x0040 +#define ASCCON_OEN 0x0080 +#define ASCCON_PE 0x0100 +#define ASCCON_FE 0x0200 +#define ASCCON_OE 0x0400 +#define ASCCON_FDE 0x0800 +#define ASCCON_ODD 0x1000 +#define ASCCON_BRS 0x2000 +#define ASCCON_LB 0x4000 +#define ASCCON_R 0x8000 + +/* WHBCON register's bits and bitfields */ +#define ASCWHBCON_CLRREN 0x0010 +#define ASCWHBCON_SETREN 0x0020 +#define ASCWHBCON_CLRPE 0x0100 +#define ASCWHBCON_CLRFE 0x0200 +#define ASCWHBCON_CLROE 0x0400 +#define ASCWHBCON_SETPE 0x0800 +#define ASCWHBCON_SETFE 0x1000 +#define ASCWHBCON_SETOE 0x2000 + +/* ABCON register's bits and bitfields */ +#define ASCABCON_ABEN 0x0001 +#define ASCABCON_AUREN 0x0002 +#define ASCABCON_ABSTEN 0x0004 +#define ASCABCON_ABDETEN 0x0008 +#define ASCABCON_FCDETEN 0x0010 +#define ASCABCON_EMMASK 0x0300 + #define ASCABCON_EMOFF 8 + #define ASCABCON_EM_DISAB 0x0 + #define ASCABCON_EM_DURAB 0x1 + #define ASCABCON_EM_ALWAYS 0x2 +#define ASCABCON_TXINV 0x0400 +#define ASCABCON_RXINV 0x0800 + +/* FDV register mask, offset and bitfields*/ +#define ASCFDV_VALUE_MASK 0x000001FF + +/* WHBABCON register's bits and bitfields */ +#define ASCWHBABCON_SETABEN 0x0001 +#define ASCWHBABCON_CLRABEN 0x0002 + +/* ABSTAT register's bits and bitfields */ +#define ASCABSTAT_FCSDET 0x0001 +#define ASCABSTAT_FCCDET 0x0002 +#define ASCABSTAT_SCSDET 0x0004 +#define ASCABSTAT_SCCDET 0x0008 +#define ASCABSTAT_DETWAIT 0x0010 + +/* WHBABSTAT register's bits and bitfields */ +#define ASCWHBABSTAT_CLRFCSDET 0x0001 +#define ASCWHBABSTAT_SETFCSDET 0x0002 +#define ASCWHBABSTAT_CLRFCCDET 0x0004 +#define ASCWHBABSTAT_SETFCCDET 0x0008 +#define ASCWHBABSTAT_CLRSCSDET 0x0010 +#define ASCWHBABSTAT_SETSCSDET 0x0020 +#define ASCWHBABSTAT_SETSCCDET 0x0040 +#define ASCWHBABSTAT_CLRSCCDET 0x0080 +#define ASCWHBABSTAT_CLRDETWAIT 0x0100 +#define ASCWHBABSTAT_SETDETWAIT 0x0200 + +/* TXFCON register's bits and bitfields */ +#define ASCTXFCON_TXFEN 0x0001 +#define ASCTXFCON_TXFFLU 0x0002 +#define ASCTXFCON_TXTMEN 0x0004 +#define ASCTXFCON_TXFITLMASK 0x3F00 +#define ASCTXFCON_TXFITLOFF 8 + +/* RXFCON register's bits and bitfields */ +#define ASCRXFCON_RXFEN 0x0001 +#define ASCRXFCON_RXFFLU 0x0002 +#define ASCRXFCON_RXTMEN 0x0004 +#define ASCRXFCON_RXFITLMASK 0x3F00 +#define ASCRXFCON_RXFITLOFF 8 + +/* FSTAT register's bits and bitfields */ +#define ASCFSTAT_RXFFLMASK 0x003F +#define ASCFSTAT_TXFFLMASK 0x3F00 +#define ASCFSTAT_TXFFLOFF 8 + +#define INCAASC_PMU_ENABLE(BIT) *((volatile ulong*)0xBF102000) |= (0x1 << BIT); + +typedef struct /* incaAsc_t */ +{ + volatile unsigned long asc_clc; /*0x0000*/ + volatile unsigned long asc_pisel; /*0x0004*/ + volatile unsigned long asc_rsvd1[2]; /* for mapping */ /*0x0008*/ + volatile unsigned long asc_con; /*0x0010*/ + volatile unsigned long asc_bg; /*0x0014*/ + volatile unsigned long asc_fdv; /*0x0018*/ + volatile unsigned long asc_pmw; /* not used */ /*0x001C*/ + volatile unsigned long asc_tbuf; /*0x0020*/ + volatile unsigned long asc_rbuf; /*0x0024*/ + volatile unsigned long asc_rsvd2[2]; /* for mapping */ /*0x0028*/ + volatile unsigned long asc_abcon; /*0x0030*/ + volatile unsigned long asc_abstat; /* not used */ /*0x0034*/ + volatile unsigned long asc_rsvd3[2]; /* for mapping */ /*0x0038*/ + volatile unsigned long asc_rxfcon; /*0x0040*/ + volatile unsigned long asc_txfcon; /*0x0044*/ + volatile unsigned long asc_fstat; /*0x0048*/ + volatile unsigned long asc_rsvd4; /* for mapping */ /*0x004C*/ + volatile unsigned long asc_whbcon; /*0x0050*/ + volatile unsigned long asc_whbabcon; /*0x0054*/ + volatile unsigned long asc_whbabstat; /* not used */ /*0x0058*/ + +} incaAsc_t; + +#endif /* __INCincaAscSioh */ + diff --git a/cpu/mips/start.S b/cpu/mips/start.S new file mode 100644 index 000000000..bf1165561 --- /dev/null +++ b/cpu/mips/start.S @@ -0,0 +1,350 @@ +/* + * Startup Code for MIPS32 CPU-core + * + * Copyright (c) 2003 Wolfgang Denk <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 <config.h> +#include <version.h> +#include <asm/regdef.h> +#include <asm/mipsregs.h> + + +#define RVECENT(f,n) \ + b f; nop +#define XVECENT(f,bev) \ + b f ; \ + li k0,bev + + .set noreorder + + .globl _start + .text +_start: + RVECENT(reset,0) /* U-boot entry point */ + RVECENT(reset,1) /* software reboot */ +#ifdef CONFIG_INCA_IP + .word 0x000020C4 /* EBU init code, fetched during booting */ + .word 0x00000000 /* phase of the flash */ +#else + RVECENT(romReserved,2) +#endif + RVECENT(romReserved,3) + RVECENT(romReserved,4) + RVECENT(romReserved,5) + RVECENT(romReserved,6) + RVECENT(romReserved,7) + RVECENT(romReserved,8) + RVECENT(romReserved,9) + RVECENT(romReserved,10) + RVECENT(romReserved,11) + RVECENT(romReserved,12) + RVECENT(romReserved,13) + RVECENT(romReserved,14) + RVECENT(romReserved,15) + RVECENT(romReserved,16) + RVECENT(romReserved,17) + RVECENT(romReserved,18) + RVECENT(romReserved,19) + RVECENT(romReserved,20) + RVECENT(romReserved,21) + RVECENT(romReserved,22) + RVECENT(romReserved,23) + RVECENT(romReserved,24) + RVECENT(romReserved,25) + RVECENT(romReserved,26) + RVECENT(romReserved,27) + RVECENT(romReserved,28) + RVECENT(romReserved,29) + RVECENT(romReserved,30) + RVECENT(romReserved,31) + RVECENT(romReserved,32) + RVECENT(romReserved,33) + RVECENT(romReserved,34) + RVECENT(romReserved,35) + RVECENT(romReserved,36) + RVECENT(romReserved,37) + RVECENT(romReserved,38) + RVECENT(romReserved,39) + RVECENT(romReserved,40) + RVECENT(romReserved,41) + RVECENT(romReserved,42) + RVECENT(romReserved,43) + RVECENT(romReserved,44) + RVECENT(romReserved,45) + RVECENT(romReserved,46) + RVECENT(romReserved,47) + RVECENT(romReserved,48) + RVECENT(romReserved,49) + RVECENT(romReserved,50) + RVECENT(romReserved,51) + RVECENT(romReserved,52) + RVECENT(romReserved,53) + RVECENT(romReserved,54) + RVECENT(romReserved,55) + RVECENT(romReserved,56) + RVECENT(romReserved,57) + RVECENT(romReserved,58) + RVECENT(romReserved,59) + RVECENT(romReserved,60) + RVECENT(romReserved,61) + RVECENT(romReserved,62) + RVECENT(romReserved,63) + XVECENT(romExcHandle,0x200) /* bfc00200: R4000 tlbmiss vector */ + RVECENT(romReserved,65) + RVECENT(romReserved,66) + RVECENT(romReserved,67) + RVECENT(romReserved,68) + RVECENT(romReserved,69) + RVECENT(romReserved,70) + RVECENT(romReserved,71) + RVECENT(romReserved,72) + RVECENT(romReserved,73) + RVECENT(romReserved,74) + RVECENT(romReserved,75) + RVECENT(romReserved,76) + RVECENT(romReserved,77) + RVECENT(romReserved,78) + RVECENT(romReserved,79) + XVECENT(romExcHandle,0x280) /* bfc00280: R4000 xtlbmiss vector */ + RVECENT(romReserved,81) + RVECENT(romReserved,82) + RVECENT(romReserved,83) + RVECENT(romReserved,84) + RVECENT(romReserved,85) + RVECENT(romReserved,86) + RVECENT(romReserved,87) + RVECENT(romReserved,88) + RVECENT(romReserved,89) + RVECENT(romReserved,90) + RVECENT(romReserved,91) + RVECENT(romReserved,92) + RVECENT(romReserved,93) + RVECENT(romReserved,94) + RVECENT(romReserved,95) + XVECENT(romExcHandle,0x300) /* bfc00300: R4000 cache vector */ + RVECENT(romReserved,97) + RVECENT(romReserved,98) + RVECENT(romReserved,99) + RVECENT(romReserved,100) + RVECENT(romReserved,101) + RVECENT(romReserved,102) + RVECENT(romReserved,103) + RVECENT(romReserved,104) + RVECENT(romReserved,105) + RVECENT(romReserved,106) + RVECENT(romReserved,107) + RVECENT(romReserved,108) + RVECENT(romReserved,109) + RVECENT(romReserved,110) + RVECENT(romReserved,111) + XVECENT(romExcHandle,0x380) /* bfc00380: R4000 general vector */ + RVECENT(romReserved,113) + RVECENT(romReserved,114) + RVECENT(romReserved,115) + RVECENT(romReserved,116) + RVECENT(romReserved,116) + RVECENT(romReserved,118) + RVECENT(romReserved,119) + RVECENT(romReserved,120) + RVECENT(romReserved,121) + RVECENT(romReserved,122) + RVECENT(romReserved,123) + RVECENT(romReserved,124) + RVECENT(romReserved,125) + RVECENT(romReserved,126) + RVECENT(romReserved,127) + + /* We hope there are no more reserved vectors! + * 128 * 8 == 1024 == 0x400 + * so this is address R_VEC+0x400 == 0xbfc00400 + */ + .align 4 +reset: + + /* Clear watch registers. + */ + mtc0 zero, CP0_WATCHLO + mtc0 zero, CP0_WATCHHI + + /* STATUS register */ + mfc0 k0, CP0_STATUS + li k1, ~ST0_IE + and k0, k1 + mtc0 k0, CP0_STATUS + + /* CAUSE register */ + mtc0 zero, CP0_CAUSE + + /* Init Timer */ + mtc0 zero, CP0_COUNT + mtc0 zero, CP0_COMPARE + + /* CONFIG0 register */ + li t0, CONF_CM_UNCACHED + mtc0 t0, CP0_CONFIG + +#ifdef CONFIG_INCA_IP + /* Disable INCA-IP Watchdog. + */ + bal disable_incaip_wdt + nop +#endif + + /* Initialize any external memory. + */ + bal memsetup + nop + + /* Initialize caches... + */ + bal mips_cache_reset + nop + + /* ... and enable them. + */ + li t0, CONF_CM_CACHABLE_NONCOHERENT + mtc0 t0, CP0_CONFIG + + + /* Set up temporary stack. + */ + li a0, CFG_INIT_SP_OFFSET + bal mips_cache_lock + nop + + li t0, CFG_SDRAM_BASE + CFG_INIT_SP_OFFSET + la sp, 0(t0) + + /* Initialize GOT pointer. + */ + bal 1f + nop + .word _GLOBAL_OFFSET_TABLE_ - 1f + 4 +1: + move gp, ra + lw t1, 0(ra) + add gp, t1 + la t9, board_init_f + j t9 + nop + + +/* + * void relocate_code (addr_sp, gd, addr_moni) + * + * This "function" does not return, instead it continues in RAM + * after relocating the monitor code. + * + * a0 = addr_sp + * a1 = gd + * a2 = destination address + */ + .globl relocate_code + .ent relocate_code +relocate_code: + move sp, a0 /* Set new stack pointer */ + + /* + * Fix GOT pointer: + * + * New GOT-PTR = (old GOT-PTR - CFG_MONITOR_BASE) + Destination Address + */ + move t6, gp + sub gp, CFG_MONITOR_BASE + add gp, a2 /* gp now adjusted */ + sub t6, gp, t6 /* t6 <-- relocation offset */ + + li t0, CFG_MONITOR_BASE + add t2, t0, CFG_MONITOR_LEN + move t1, a2 + + /* + * t0 = source address + * t1 = target address + * t2 = source end address + */ +1: + lw t3, 0(t0) + sw t3, 0(t1) + addu t0, 4 + ble t0, t2, 1b + addu t1, 4 /* delay slot */ + + /* If caches were enabled, we would have to flush them here. + */ + + /* Jump to where we've relocated ourselves. + */ + addi t0, a2, in_ram - _start + j t0 + nop + + .word uboot_end_data + .word uboot_end + .word num_got_entries + +in_ram: + /* Now we want to update GOT. + */ + lw t3, -4(t0) /* t3 <-- num_got_entries */ + addi t4, gp, 8 /* Skipping first two entries. */ + li t2, 2 +1: + lw t1, 0(t4) + beqz t1, 2f + add t1, t6 + sw t1, 0(t4) +2: + addi t2, 1 + blt t2, t3, 1b + addi t4, 4 /* delay slot */ + + /* Clear BSS. + */ + lw t1, -12(t0) /* t1 <-- uboot_end_data */ + lw t2, -8(t0) /* t2 <-- uboot_end */ + add t1, t6 /* adjust pointers */ + add t2, t6 + + sub t1, 4 +1: addi t1, 4 + bltl t1, t2, 1b + sw zero, 0(t1) /* delay slot */ + + move a0, a1 + la t9, board_init_r + j t9 + move a1, a2 /* delay slot */ + + .end relocate_code + + + + /* Exception handlers. + */ +romReserved: + b romReserved + +romExcHandle: + b romExcHandle + |