diff options
Diffstat (limited to 'cpu')
| -rw-r--r-- | cpu/nios2/Makefile | 48 | ||||
| -rw-r--r-- | cpu/nios2/config.mk | 24 | ||||
| -rw-r--r-- | cpu/nios2/cpu.c | 50 | ||||
| -rw-r--r-- | cpu/nios2/epcs.c | 733 | ||||
| -rw-r--r-- | cpu/nios2/exceptions.S | 155 | ||||
| -rw-r--r-- | cpu/nios2/interrupts.c | 265 | ||||
| -rw-r--r-- | cpu/nios2/start.S | 217 | ||||
| -rw-r--r-- | cpu/nios2/sysid.c | 58 | ||||
| -rw-r--r-- | cpu/nios2/traps.c | 42 |
9 files changed, 0 insertions, 1592 deletions
diff --git a/cpu/nios2/Makefile b/cpu/nios2/Makefile deleted file mode 100644 index 3dfaa83..0000000 --- a/cpu/nios2/Makefile +++ /dev/null @@ -1,48 +0,0 @@ -# -# (C) Copyright 2000-2006 -# 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 = $(obj)lib$(CPU).a - -START = start.o -SOBJS = exceptions.o -COBJS = cpu.o interrupts.o sysid.o traps.o epcs.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) - -######################################################################### - -# defines $(obj).depend target -include $(SRCTREE)/rules.mk - -sinclude $(obj).depend - -######################################################################### diff --git a/cpu/nios2/config.mk b/cpu/nios2/config.mk deleted file mode 100644 index f228d72..0000000 --- a/cpu/nios2/config.mk +++ /dev/null @@ -1,24 +0,0 @@ -# -# (C) Copyright 2000 -# 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 += diff --git a/cpu/nios2/cpu.c b/cpu/nios2/cpu.c deleted file mode 100644 index 6379534..0000000 --- a/cpu/nios2/cpu.c +++ /dev/null @@ -1,50 +0,0 @@ -/* - * (C) Copyright 2004, Psyent Corporation <www.psyent.com> - * Scott McNutt <smcnutt@psyent.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 <nios2.h> -#include <nios2-io.h> - -#if defined (CONFIG_SYS_NIOS_SYSID_BASE) -extern void display_sysid (void); -#endif /* CONFIG_SYS_NIOS_SYSID_BASE */ - -int checkcpu (void) -{ - printf ("CPU : Nios-II\n"); -#if !defined(CONFIG_SYS_NIOS_SYSID_BASE) - printf ("SYSID : <unknown>\n"); -#else - display_sysid (); -#endif - return (0); -} - - -int do_reset (void) -{ - void (*rst)(void) = (void(*)(void))CONFIG_SYS_RESET_ADDR; - disable_interrupts (); - rst(); - return(0); -} diff --git a/cpu/nios2/epcs.c b/cpu/nios2/epcs.c deleted file mode 100644 index ab7d746..0000000 --- a/cpu/nios2/epcs.c +++ /dev/null @@ -1,733 +0,0 @@ -/* - * (C) Copyright 2004, Psyent Corporation <www.psyent.com> - * Scott McNutt <smcnutt@psyent.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> - -#if defined(CONFIG_SYS_NIOS_EPCSBASE) -#include <command.h> -#include <asm/io.h> -#include <nios2-io.h> -#include <nios2-epcs.h> - - -/*-----------------------------------------------------------------------*/ -#define SHORT_HELP\ - "epcs - read/write Cyclone EPCS configuration device.\n" - -#define LONG_HELP\ - "\n"\ - "epcs erase start [end]\n"\ - " - erase sector start or sectors start through end.\n"\ - "epcs info\n"\ - " - display EPCS device information.\n"\ - "epcs protect on | off\n"\ - " - turn device protection on or off.\n"\ - "epcs read addr offset count\n"\ - " - read count bytes from offset to addr.\n"\ - "epcs write addr offset count\n"\ - " - write count bytes to offset from addr.\n"\ - "epcs verify addr offset count\n"\ - " - verify count bytes at offset from addr." - - -/*-----------------------------------------------------------------------*/ -/* Operation codes for serial configuration devices - */ -#define EPCS_WRITE_ENA 0x06 /* Write enable */ -#define EPCS_WRITE_DIS 0x04 /* Write disable */ -#define EPCS_READ_STAT 0x05 /* Read status */ -#define EPCS_READ_BYTES 0x03 /* Read bytes */ -#define EPCS_READ_ID 0xab /* Read silicon id */ -#define EPCS_WRITE_STAT 0x01 /* Write status */ -#define EPCS_WRITE_BYTES 0x02 /* Write bytes */ -#define EPCS_ERASE_BULK 0xc7 /* Erase entire device */ -#define EPCS_ERASE_SECT 0xd8 /* Erase sector */ - -/* Device status register bits - */ -#define EPCS_STATUS_WIP (1<<0) /* Write in progress */ -#define EPCS_STATUS_WEL (1<<1) /* Write enable latch */ - -/* Misc - */ -#define EPCS_TIMEOUT 100 /* 100 msec timeout */ - -static nios_spi_t *epcs = (nios_spi_t *)CONFIG_SYS_NIOS_EPCSBASE; - -/*********************************************************************** - * Device access - ***********************************************************************/ -static int epcs_cs (int assert) -{ - ulong start; - unsigned tmp; - - - if (assert) { - tmp = readl (&epcs->control); - writel (tmp | NIOS_SPI_SSO, &epcs->control); - } else { - /* Let all bits shift out */ - start = get_timer (0); - while ((readl (&epcs->status) & NIOS_SPI_TMT) == 0) - if (get_timer (start) > EPCS_TIMEOUT) - return (-1); - tmp = readl (&epcs->control); - writel (tmp & ~NIOS_SPI_SSO, &epcs->control); - } - return (0); -} - -static int epcs_tx (unsigned char c) -{ - ulong start; - - start = get_timer (0); - while ((readl (&epcs->status) & NIOS_SPI_TRDY) == 0) - if (get_timer (start) > EPCS_TIMEOUT) - return (-1); - writel (c, &epcs->txdata); - return (0); -} - -static int epcs_rx (void) -{ - ulong start; - - start = get_timer (0); - while ((readl (&epcs->status) & NIOS_SPI_RRDY) == 0) - if (get_timer (start) > EPCS_TIMEOUT) - return (-1); - return (readl (&epcs->rxdata)); -} - -static unsigned char bitrev[] = { - 0x00, 0x08, 0x04, 0x0c, 0x02, 0x0a, 0x06, 0x0e, - 0x01, 0x09, 0x05, 0x0d, 0x03, 0x0b, 0x07, 0x0f -}; - -static unsigned char epcs_bitrev (unsigned char c) -{ - unsigned char val; - - val = bitrev[c>>4]; - val |= bitrev[c & 0x0f]<<4; - return (val); -} - -static void epcs_rcv (unsigned char *dst, int len) -{ - while (len--) { - epcs_tx (0); - *dst++ = epcs_rx (); - } -} - -static void epcs_rrcv (unsigned char *dst, int len) -{ - while (len--) { - epcs_tx (0); - *dst++ = epcs_bitrev (epcs_rx ()); - } -} - -static void epcs_snd (unsigned char *src, int len) -{ - while (len--) { - epcs_tx (*src++); - epcs_rx (); - } -} - -static void epcs_rsnd (unsigned char *src, int len) -{ - while (len--) { - epcs_tx (epcs_bitrev (*src++)); - epcs_rx (); - } -} - -static void epcs_wr_enable (void) -{ - epcs_cs (1); - epcs_tx (EPCS_WRITE_ENA); - epcs_rx (); - epcs_cs (0); -} - -static unsigned char epcs_status_rd (void) -{ - unsigned char status; - - epcs_cs (1); - epcs_tx (EPCS_READ_STAT); - epcs_rx (); - epcs_tx (0); - status = epcs_rx (); - epcs_cs (0); - return (status); -} - -static void epcs_status_wr (unsigned char status) -{ - epcs_wr_enable (); - epcs_cs (1); - epcs_tx (EPCS_WRITE_STAT); - epcs_rx (); - epcs_tx (status); - epcs_rx (); - epcs_cs (0); - return; -} - -/*********************************************************************** - * Device information - ***********************************************************************/ - -static struct epcs_devinfo_t devinfo[] = { - { "EPCS1 ", 0x10, 17, 4, 15, 8, 0x0c }, - { "EPCS4 ", 0x12, 19, 8, 16, 8, 0x1c }, - { "EPCS16", 0x14, 21, 32, 16, 8, 0x1c }, - { "EPCS64", 0x16, 23,128, 16, 8, 0x1c }, - { 0, 0, 0, 0, 0, 0 } -}; - -int epcs_reset (void) -{ - /* When booting from an epcs controller, the epcs bootrom - * code may leave the slave select in an asserted state. - * This causes two problems: (1) The initial epcs access - * will fail -- not a big deal, and (2) a software reset - * will cause the bootrom code to hang since it does not - * ensure the select is negated prior to first access -- a - * big deal. Here we just negate chip select and everything - * gets better :-) - */ - epcs_cs (0); /* Negate chip select */ - return (0); -} - -epcs_devinfo_t *epcs_dev_find (void) -{ - unsigned char buf[4]; - unsigned char id; - int i; - struct epcs_devinfo_t *dev = NULL; - - /* Read silicon id requires 3 "dummy bytes" before it's put - * on the wire. - */ - buf[0] = EPCS_READ_ID; - buf[1] = 0; - buf[2] = 0; - buf[3] = 0; - - epcs_cs (1); - epcs_snd (buf,4); - epcs_rcv (buf,1); - if (epcs_cs (0) == -1) - return (NULL); - id = buf[0]; - - /* Find the info struct */ - i = 0; - while (devinfo[i].name) { - if (id == devinfo[i].id) { - dev = &devinfo[i]; - break; - } - i++; - } - - return (dev); -} - -/*********************************************************************** - * Misc Utilities - ***********************************************************************/ -int epcs_cfgsz (void) -{ - int sz = 0; - unsigned char buf[128]; - unsigned char *p; - struct epcs_devinfo_t *dev = epcs_dev_find (); - - if (!dev) - return (-1); - - /* Read in the first 128 bytes of the device */ - buf[0] = EPCS_READ_BYTES; - buf[1] = 0; - buf[2] = 0; - buf[3] = 0; - - epcs_cs (1); - epcs_snd (buf,4); - epcs_rrcv (buf, sizeof(buf)); - epcs_cs (0); - - /* Search for the starting 0x6a which is followed by the - * 4-byte 'register' and 4-byte bit-count. - */ - p = buf; - while (p < buf + sizeof(buf)-8) { - if ( *p == 0x6a ) { - /* Point to bit count and extract */ - p += 5; - sz = *p++; - sz |= *p++ << 8; - sz |= *p++ << 16; - sz |= *p++ << 24; - /* Convert to byte count */ - sz += 7; - sz >>= 3; - } else if (*p == 0xff) { - /* 0xff is ok ... just skip */ - p++; - continue; - } else { - /* Not 0xff or 0x6a ... something's not - * right ... report 'unknown' (sz=0). - */ - break; - } - } - return (sz); -} - -int epcs_erase (unsigned start, unsigned end) -{ - unsigned off, sectsz; - unsigned char buf[4]; - struct epcs_devinfo_t *dev = epcs_dev_find (); - - if (!dev || (start>end)) - return (-1); - - /* Erase the requested sectors. An address is required - * that lies within the requested sector -- we'll just - * use the first address in the sector. - */ - printf ("epcs erasing sector %d ", start); - if (start != end) - printf ("to %d ", end); - sectsz = (1 << dev->sz_sect); - while (start <= end) { - off = start * sectsz; - start++; - - buf[0] = EPCS_ERASE_SECT; - buf[1] = off >> 16; - buf[2] = off >> 8; - buf[3] = off; - - epcs_wr_enable (); - epcs_cs (1); - epcs_snd (buf,4); - epcs_cs (0); - - printf ("."); /* Some user feedback */ - - /* Wait for erase to complete */ - while (epcs_status_rd() & EPCS_STATUS_WIP) - ; - } - printf (" done.\n"); - return (0); -} - -int epcs_read (ulong addr, ulong off, ulong cnt) -{ - unsigned char buf[4]; - struct epcs_devinfo_t *dev = epcs_dev_find (); - - if (!dev) - return (-1); - - buf[0] = EPCS_READ_BYTES; - buf[1] = off >> 16; - buf[2] = off >> 8; - buf[3] = off; - - epcs_cs (1); - epcs_snd (buf,4); - epcs_rrcv ((unsigned char *)addr, cnt); - epcs_cs (0); - - return (0); -} - -int epcs_write (ulong addr, ulong off, ulong cnt) -{ - ulong wrcnt; - unsigned pgsz; - unsigned char buf[4]; - struct epcs_devinfo_t *dev = epcs_dev_find (); - - if (!dev) - return (-1); - - pgsz = (1<<dev->sz_page); - while (cnt) { - if (off % pgsz) - wrcnt = pgsz - (off % pgsz); - else - wrcnt = pgsz; - wrcnt = (wrcnt > cnt) ? cnt : wrcnt; - - buf[0] = EPCS_WRITE_BYTES; - buf[1] = off >> 16; - buf[2] = off >> 8; - buf[3] = off; - - epcs_wr_enable (); - epcs_cs (1); - epcs_snd (buf,4); - epcs_rsnd ((unsigned char *)addr, wrcnt); - epcs_cs (0); - - /* Wait for write to complete */ - while (epcs_status_rd() & EPCS_STATUS_WIP) - ; - - cnt -= wrcnt; - off += wrcnt; - addr += wrcnt; - } - - return (0); -} - -int epcs_verify (ulong addr, ulong off, ulong cnt, ulong *err) -{ - ulong rdcnt; - unsigned char buf[256]; - unsigned char *start,*end; - int i; - - start = end = (unsigned char *)addr; - while (cnt) { - rdcnt = (cnt>sizeof(buf)) ? sizeof(buf) : cnt; - epcs_read ((ulong)buf, off, rdcnt); - for (i=0; i<rdcnt; i++) { - if (*end != buf[i]) { - *err = end - start; - return(-1); - } - end++; - } - cnt -= rdcnt; - off += rdcnt; - } - return (0); -} - -static int epcs_sect_erased (int sect, unsigned *offset, - struct epcs_devinfo_t *dev) -{ - unsigned char buf[128]; - unsigned off, end; - unsigned sectsz; - int i; - - sectsz = (1 << dev->sz_sect); - off = sectsz * sect; - end = off + sectsz; - - while (off < end) { - epcs_read ((ulong)buf, off, sizeof(buf)); - for (i=0; i < sizeof(buf); i++) { - if (buf[i] != 0xff) { - *offset = off + i; - return (0); - } - } - off += sizeof(buf); - } - return (1); -} - - -/*********************************************************************** - * Commands - ***********************************************************************/ -static -void do_epcs_info (struct epcs_devinfo_t *dev, int argc, char *argv[]) -{ - int i; - unsigned char stat; - unsigned tmp; - int erased; - - /* Basic device info */ - printf ("%s: %d kbytes (%d sectors x %d kbytes," - " %d bytes/page)\n", - dev->name, 1 << (dev->size-10), - dev->num_sects, 1 << (dev->sz_sect-10), - 1 << dev->sz_page ); - - /* Status -- for now protection is all-or-nothing */ - stat = epcs_status_rd(); - printf ("status: 0x%02x (WIP:%d, WEL:%d, PROT:%s)\n", - stat, - (stat & EPCS_STATUS_WIP) ? 1 : 0, - (stat & EPCS_STATUS_WEL) ? 1 : 0, - (stat & dev->prot_mask) ? "on" : "off" ); - - /* Configuration */ - tmp = epcs_cfgsz (); - if (tmp) { - printf ("config: 0x%06x (%d) bytes\n", tmp, tmp ); - } else { - printf ("config: unknown\n" ); - } - - /* Sector info */ - for (i=0; (i < dev->num_sects) && (argc > 1); i++) { - erased = epcs_sect_erased (i, &tmp, dev); - if ((i & 0x03) == 0) printf ("\n"); - printf ("%4d: %07x ", - i, i*(1<<dev->sz_sect) ); - if (erased) - printf ("E "); - else - printf (" "); - } - printf ("\n"); - - return; -} - -static -void do_epcs_erase (struct epcs_devinfo_t *dev, int argc, char *argv[]) -{ - unsigned start,end; - - if ((argc < 3) || (argc > 4)) { - printf ("USAGE: epcs erase sect [end]\n"); - return; - } - if ((epcs_status_rd() & dev->prot_mask) != 0) { - printf ( "epcs: device protected.\n"); - return; - } - - start = simple_strtoul (argv[2], NULL, 10); - if (argc > 3) - end = simple_strtoul (argv[3], NULL, 10); - else - end = start; - if ((start >= dev->num_sects) || (start > end)) { - printf ("epcs: invalid sector range: [%d:%d]\n", - start, end ); - return; - } - - epcs_erase (start, end); - - return; -} - -static -void do_epcs_protect (struct epcs_devinfo_t *dev, int argc, char *argv[]) -{ - unsigned char stat; - - /* For now protection is all-or-nothing to keep things - * simple. The protection bits don't map in a linear - * fashion ... and we would rather protect the bottom - * of the device since it contains the config data and - * leave the top unprotected for app use. But unfortunately - * protection works from top-to-bottom so it does - * really help very much from a software app point-of-view. - */ - if (argc < 3) { - printf ("USAGE: epcs protect on | off\n"); - return; - } - if (!dev) - return; - - /* Protection on/off is just a matter of setting/clearing - * all protection bits in the status register. - */ - stat = epcs_status_rd (); - if (strcmp ("on", argv[2]) == 0) { - stat |= dev->prot_mask; - } else if (strcmp ("off", argv[2]) == 0 ) { - stat &= ~dev->prot_mask; - } else { - printf ("epcs: unknown protection: %s\n", argv[2]); - return; - } - epcs_status_wr (stat); - return; -} - -static -void do_epcs_read (struct epcs_devinfo_t *dev, int argc, char *argv[]) -{ - ulong addr,off,cnt; - ulong sz; - - if (argc < 5) { - printf ("USAGE: epcs read addr offset count\n"); - return; - } - - sz = 1 << dev->size; - addr = simple_strtoul (argv[2], NULL, 16); - off = simple_strtoul (argv[3], NULL, 16); - cnt = simple_strtoul (argv[4], NULL, 16); - if (off > sz) { - printf ("offset is greater than device size" - "... aborting.\n"); - return; - } - if ((off + cnt) > sz) { - printf ("request exceeds device size" - "... truncating.\n"); - cnt = sz - off; - } - printf ("epcs: read %08lx <- %06lx (0x%lx bytes)\n", - addr, off, cnt); - epcs_read (addr, off, cnt); - - return; -} - -static -void do_epcs_write (struct epcs_devinfo_t *dev, int argc, char *argv[]) -{ - ulong addr,off,cnt; - ulong sz; - ulong err; - - if (argc < 5) { - printf ("USAGE: epcs write addr offset count\n"); - return; - } - if ((epcs_status_rd() & dev->prot_mask) != 0) { - printf ( "epcs: device protected.\n"); - return; - } - - sz = 1 << dev->size; - addr = simple_strtoul (argv[2], NULL, 16); - off = simple_strtoul (argv[3], NULL, 16); - cnt = simple_strtoul (argv[4], NULL, 16); - if (off > sz) { - printf ("offset is greater than device size" - "... aborting.\n"); - return; - } - if ((off + cnt) > sz) { - printf ("request exceeds device size" - "... truncating.\n"); - cnt = sz - off; - } - printf ("epcs: write %08lx -> %06lx (0x%lx bytes)\n", - addr, off, cnt); - epcs_write (addr, off, cnt); - if (epcs_verify (addr, off, cnt, &err) != 0) - printf ("epcs: write error at offset %06lx\n", err); - - return; -} - -static -void do_epcs_verify (struct epcs_devinfo_t *dev, int argc, char *argv[]) -{ - ulong addr,off,cnt; - ulong sz; - ulong err; - - if (argc < 5) { - printf ("USAGE: epcs verify addr offset count\n"); - return; - } - - sz = 1 << dev->size; - addr = simple_strtoul (argv[2], NULL, 16); - off = simple_strtoul (argv[3], NULL, 16); - cnt = simple_strtoul (argv[4], NULL, 16); - if (off > sz) { - printf ("offset is greater than device size" - "... aborting.\n"); - return; - } - if ((off + cnt) > sz) { - printf ("request exceeds device size" - "... truncating.\n"); - cnt = sz - off; - } - printf ("epcs: verify %08lx -> %06lx (0x%lx bytes)\n", - addr, off, cnt); - if (epcs_verify (addr, off, cnt, &err) != 0) - printf ("epcs: verify error at offset %06lx\n", err); - - return; -} - -/*-----------------------------------------------------------------------*/ -int do_epcs (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) -{ - int len; - struct epcs_devinfo_t *dev = epcs_dev_find (); - - if (!dev) { - printf ("epcs: device not found.\n"); - return (-1); - } - - if (argc < 2) { - do_epcs_info (dev, argc, argv); - return (0); - } - - len = strlen (argv[1]); - if (strncmp ("info", argv[1], len) == 0) { - do_epcs_info (dev, argc, argv); - } else if (strncmp ("erase", argv[1], len) == 0) { - do_epcs_erase (dev, argc, argv); - } else if (strncmp ("protect", argv[1], len) == 0) { - do_epcs_protect (dev, argc, argv); - } else if (strncmp ("read", argv[1], len) == 0) { - do_epcs_read (dev, argc, argv); - } else if (strncmp ("write", argv[1], len) == 0) { - do_epcs_write (dev, argc, argv); - } else if (strncmp ("verify", argv[1], len) == 0) { - do_epcs_verify (dev, argc, argv); - } else { - printf ("epcs: unknown operation: %s\n", argv[1]); - } - - return (0); -} - -/*-----------------------------------------------------------------------*/ - - -U_BOOT_CMD( epcs, 5, 0, do_epcs, SHORT_HELP, LONG_HELP ); - -#endif /* CONFIG_NIOS_EPCS */ diff --git a/cpu/nios2/exceptions.S b/cpu/nios2/exceptions.S deleted file mode 100644 index b9c7a58..0000000 --- a/cpu/nios2/exceptions.S +++ /dev/null @@ -1,155 +0,0 @@ -/* - * (C) Copyright 2004, Psyent Corporation <www.psyent.com> - * Scott McNutt <smcnutt@psyent.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 <asm/opcodes.h> - - - .text - .align 4 - - .global _exception - - .set noat - .set nobreak - -_exception: - /* SAVE ALL REGS -- this allows trap and unimplemented - * instruction handlers to be coded conveniently in C - */ - addi sp, sp, -(33*4) - stw r0, 0(sp) - stw r1, 4(sp) - stw r2, 8(sp) - stw r3, 12(sp) - stw r4, 16(sp) - stw r5, 20(sp) - stw r6, 24(sp) - stw r7, 28(sp) - stw r8, 32(sp) - stw r9, 36(sp) - stw r10, 40(sp) - stw r11, 44(sp) - stw r12, 48(sp) - stw r13, 52(sp) - stw r14, 56(sp) - stw r15, 60(sp) - stw r16, 64(sp) - stw r17, 68(sp) - stw r19, 72(sp) - stw r19, 76(sp) - stw r20, 80(sp) - stw r21, 84(sp) - stw r22, 88(sp) - stw r23, 92(sp) - stw r24, 96(sp) - stw r25, 100(sp) - stw r26, 104(sp) - stw r27, 108(sp) - stw r28, 112(sp) - stw r29, 116(sp) - stw r30, 120(sp) - stw r31, 124(sp) - rdctl et, estatus - stw et, 128(sp) - - /* If interrupts are disabled -- software interrupt */ - rdctl et, estatus - andi et, et, 1 - beq et, r0, 0f - - /* If no interrupts are pending -- software interrupt */ - rdctl et, ipending - beq et, r0, 0f - - /* HARDWARE INTERRUPT: Call interrupt handler */ - movhi r3, %hi(external_interrupt) - ori r3, r3, %lo(external_interrupt) - mov r4, sp /* ptr to regs */ - callr r3 - - /* Return address fixup: execution resumes by re-issue of - * interrupted instruction at ea-4 (ea == r29). Here we do - * simple fixup to allow common exception return. - */ - ldw r3, 116(sp) - addi r3, r3, -4 - stw r3, 116(sp) - br _exception_return - -0: - /* TRAP EXCEPTION */ - movhi r3, %hi(OPC_TRAP) - ori r3, r3, %lo(OPC_TRAP) - addi r1, ea, -4 - ldw r1, 0(r1) - bne r1, r3, 1f - movhi r3, %hi(trap_handler) - ori r3, r3, %lo(trap_handler) - mov r4, sp /* ptr to regs */ - callr r3 - br _exception_return - -1: - /* UNIMPLEMENTED INSTRUCTION EXCEPTION */ - movhi r3, %hi(soft_emulation) - ori r3, r3, %lo(soft_emulation) - mov r4, sp /* ptr to regs */ - callr r3 - - /* Restore regsisters and return from exception*/ -_exception_return: - ldw r1, 4(sp) - ldw r2, 8(sp) - ldw r3, 12(sp) - ldw r4, 16(sp) - ldw r5, 20(sp) - ldw r6, 24(sp) - ldw r7, 28(sp) - ldw r8, 32(sp) - ldw r9, 36(sp) - ldw r10, 40(sp) - ldw r11, 44(sp) - ldw r12, 48(sp) - ldw r13, 52(sp) - ldw r14, 56(sp) - ldw r15, 60(sp) - ldw r16, 64(sp) - ldw r17, 68(sp) - ldw r19, 72(sp) - ldw r19, 76(sp) - ldw r20, 80(sp) - ldw r21, 84(sp) - ldw r22, 88(sp) - ldw r23, 92(sp) - ldw r24, 96(sp) - ldw r25, 100(sp) - ldw r26, 104(sp) - ldw r27, 108(sp) - ldw r28, 112(sp) - ldw r29, 116(sp) - ldw r30, 120(sp) - ldw r31, 124(sp) - addi sp, sp, (33*4) - eret -/*-------------------------------------------------------------*/ diff --git a/cpu/nios2/interrupts.c b/cpu/nios2/interrupts.c deleted file mode 100644 index b552db4..0000000 --- a/cpu/nios2/interrupts.c +++ /dev/null @@ -1,265 +0,0 @@ -/* - * (C) Copyright 2000-2002 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * (C) Copyright 2004, Psyent Corporation <www.psyent.com> - * Scott McNutt <smcnutt@psyent.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 <nios2.h> -#include <nios2-io.h> -#include <asm/types.h> -#include <asm/io.h> -#include <asm/ptrace.h> -#include <common.h> -#include <command.h> -#include <watchdog.h> -#ifdef CONFIG_STATUS_LED -#include <status_led.h> -#endif - -#if defined(CONFIG_SYS_NIOS_TMRBASE) && !defined(CONFIG_SYS_NIOS_TMRIRQ) -#error CONFIG_SYS_NIOS_TMRIRQ not defined (see documentation) -#endif - -/****************************************************************************/ - -struct irq_action { - interrupt_handler_t *handler; - void *arg; - int count; -}; - -static struct irq_action vecs[32]; - -/*************************************************************************/ -volatile ulong timestamp = 0; - -void reset_timer (void) -{ - nios_timer_t *tmr =(nios_timer_t *)CONFIG_SYS_NIOS_TMRBASE; - - /* From Embedded Peripherals Handbook: - * - * "When the hardware is configured with Writeable period - * disabled, writing to one of the period_n registers causes - * the counter to reset to the fixed Timeout Period specified - * at system generation time." - * - * Here we force a reload to prevent early timeouts from - * get_timer() when the interrupt period is greater than - * than 1 msec. - * - * Simply write to periodl with its own value to force an - * internal counter reload, THEN reset the timestamp. - */ - writel (readl (&tmr->periodl), &tmr->periodl); - timestamp = 0; - - /* From Embedded Peripherals Handbook: - * - * "Writing to one of the period_n registers stops the internal - * counter, except when the hardware is configured with Start/Stop - * control bits off. If Start/Stop control bits is off, writing - * either register does not stop the counter." - * - * In order to accomodate either configuration, the control - * register is re-written. If the counter is stopped, it will - * be restarted. If it is running, the write is essentially - * a nop. - */ - writel (NIOS_TIMER_ITO | NIOS_TIMER_CONT | NIOS_TIMER_START, - &tmr->control); - -} - -ulong get_timer (ulong base) -{ - WATCHDOG_RESET (); - return (timestamp - base); -} - -void set_timer (ulong t) -{ - timestamp = t; -} - - -/* The board must handle this interrupt if a timer is not - * provided. - */ -#if defined(CONFIG_SYS_NIOS_TMRBASE) -void tmr_isr (void *arg) -{ - nios_timer_t *tmr = (nios_timer_t *)arg; - /* Interrupt is cleared by writing anything to the - * status register. - */ - writel (0, &tmr->status); - timestamp += CONFIG_SYS_NIOS_TMRMS; -#ifdef CONFIG_STATUS_LED - status_led_tick(timestamp); -#endif -} - -static void tmr_init (void) -{ - nios_timer_t *tmr =(nios_timer_t *)CONFIG_SYS_NIOS_TMRBASE; - - writel (0, &tmr->status); - writel (0, &tmr->control); - writel (NIOS_TIMER_STOP, &tmr->control); - -#if defined(CONFIG_SYS_NIOS_TMRCNT) - writel (CONFIG_SYS_NIOS_TMRCNT & 0xffff, &tmr->periodl); - writel ((CONFIG_SYS_NIOS_TMRCNT >> 16) & 0xffff, &tmr->periodh); -#endif - writel (NIOS_TIMER_ITO | NIOS_TIMER_CONT | NIOS_TIMER_START, - &tmr->control); - irq_install_handler (CONFIG_SYS_NIOS_TMRIRQ, tmr_isr, (void *)tmr); -} - -#endif /* CONFIG_SYS_NIOS_TMRBASE */ - -/*************************************************************************/ -int disable_interrupts (void) -{ - int val = rdctl (CTL_STATUS); - wrctl (CTL_STATUS, val & ~STATUS_IE); - return (val & STATUS_IE); -} - -void enable_interrupts( void ) -{ - int val = rdctl (CTL_STATUS); - wrctl (CTL_STATUS, val | STATUS_IE); -} - -void external_interrupt (struct pt_regs *regs) -{ - unsigned irqs; - struct irq_action *act; - - /* Evaluate only irqs that are both enabled AND pending */ - irqs = rdctl (CTL_IENABLE) & rdctl (CTL_IPENDING); - act = vecs; - - /* Assume (as does the Nios2 HAL) that bit 0 is highest - * priority. NOTE: There is ALWAYS a handler assigned - * (the default if no other). - */ - while (irqs) { - if (irqs & 1) { - act->handler (act->arg); - act->count++; - } - irqs >>=1; - act++; - } -} - -static void def_hdlr (void *arg) -{ - unsigned irqs = rdctl (CTL_IENABLE); - - /* Disable the individual interrupt -- with gratuitous - * warning. - */ - irqs &= ~(1 << (int)arg); - wrctl (CTL_IENABLE, irqs); - printf ("WARNING: Disabling unhandled interrupt: %d\n", - (int)arg); -} - -/*************************************************************************/ -void irq_install_handler (int irq, interrupt_handler_t *hdlr, void *arg) -{ - - int flag; - struct irq_action *act; - unsigned ena = rdctl (CTL_IENABLE); - - if ((irq < 0) || (irq > 31)) - return; - act = &vecs[irq]; - - flag = disable_interrupts (); - if (hdlr) { - act->handler = hdlr; - act->arg = arg; - ena |= (1 << irq); /* enable */ - } else { - act->handler = def_hdlr; - act->arg = (void *)irq; - ena &= ~(1 << irq); /* disable */ - } - wrctl (CTL_IENABLE, ena); - if (flag) enable_interrupts (); -} - - -int interrupt_init (void) -{ - int i; - - /* Assign the default handler to all */ - for (i = 0; i < 32; i++) { - vecs[i].handler = def_hdlr; - vecs[i].arg = (void *)i; - vecs[i].count = 0; - } - -#if defined(CONFIG_SYS_NIOS_TMRBASE) - tmr_init (); -#endif - - enable_interrupts (); - return (0); -} - - -/*************************************************************************/ -#if defined(CONFIG_CMD_IRQ) -int do_irqinfo (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) -{ - int i; - struct irq_action *act = vecs; - - printf ("\nInterrupt-Information:\n\n"); - printf ("Nr Routine Arg Count\n"); - printf ("-----------------------------\n"); - - for (i=0; i<32; i++) { - if (act->handler != def_hdlr) { - printf ("%02d %08lx %08lx %d\n", - i, - (ulong)act->handler, - (ulong)act->arg, - act->count); - } - act++; - } - printf ("\n"); - - return (0); -} -#endif diff --git a/cpu/nios2/start.S b/cpu/nios2/start.S deleted file mode 100644 index 31cd5b0..0000000 --- a/cpu/nios2/start.S +++ /dev/null @@ -1,217 +0,0 @@ -/* - * (C) Copyright 2004, Psyent Corporation <www.psyent.com> - * Scott McNutt <smcnutt@psyent.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 <timestamp.h> -#include <version.h> - -/************************************************************************* - * RESTART - ************************************************************************/ - - .text - .global _start - -_start: - /* ICACHE INIT -- only the icache line at the reset address - * is invalidated at reset. So the init must stay within - * the cache line size (8 words). If GERMS is used, we'll - * just be invalidating the cache a second time. If cache - * is not implemented initi behaves as nop. - */ - ori r4, r0, %lo(CONFIG_SYS_ICACHELINE_SIZE) - movhi r5, %hi(CONFIG_SYS_ICACHE_SIZE) - ori r5, r5, %lo(CONFIG_SYS_ICACHE_SIZE) - mov r6, r0 -0: initi r6 - add r6, r6, r4 - bltu r6, r5, 0b - br _except_end /* Skip the tramp */ - - /* EXCEPTION TRAMPOLINE -- the following gets copied - * to the exception address (below), but is otherwise at the - * default exception vector offset (0x0020). - */ -_except_start: - movhi et, %hi(_exception) - ori et, et, %lo(_exception) - jmp et -_except_end: - - /* INTERRUPTS -- for now, all interrupts masked and globally - * disabled. - */ - wrctl status, r0 /* Disable interrupts */ - wrctl ienable, r0 /* All disabled */ - - /* DCACHE INIT -- if dcache not implemented, initd behaves as - * nop. - */ - movhi r4, %hi(CONFIG_SYS_DCACHELINE_SIZE) - ori r4, r4, %lo(CONFIG_SYS_DCACHELINE_SIZE) - movhi r5, %hi(CONFIG_SYS_DCACHE_SIZE) - ori r5, r5, %lo(CONFIG_SYS_DCACHE_SIZE) - mov r6, r0 -1: initd 0(r6) - add r6, r6, r4 - bltu r6, r5, 1b - - /* RELOCATE CODE, DATA & COMMAND TABLE -- the following code - * assumes code, data and the command table are all - * contiguous. This lets us relocate everything as a single - * block. Make sure the linker script matches this ;-) - */ - nextpc r4 -_cur: movhi r5, %hi(_cur - _start) - ori r5, r5, %lo(_cur - _start) - sub r4, r4, r5 /* r4 <- cur _start */ - mov r8, r4 - movhi r5, %hi(_start) - ori r5, r5, %lo(_start) /* r5 <- linked _start */ - beq r4, r5, 3f - - movhi r6, %hi(_edata) - ori r6, r6, %lo(_edata) -2: ldwio r7, 0(r4) - addi r4, r4, 4 - stwio r7, 0(r5) - addi r5, r5, 4 - bne r5, r6, 2b -3: - - /* ZERO BSS/SBSS -- bss and sbss are assumed to be adjacent - * and between __bss_start and _end. - */ - movhi r5, %hi(__bss_start) - ori r5, r5, %lo(__bss_start) - movhi r6, %hi(_end) - ori r6, r6, %lo(_end) - beq r5, r6, 5f - -4: stwio r0, 0(r5) - addi r5, r5, 4 - bne r5, r6, 4b -5: - - /* GLOBAL POINTER -- the global pointer is used to reference - * "small data" (see -G switch). The linker script must - * provide the gp address. - */ - movhi gp, %hi(_gp) - ori gp, gp, %lo(_gp) - - /* JUMP TO RELOC ADDR */ - movhi r4, %hi(_reloc) - ori r4, r4, %lo(_reloc) - jmp r4 -_reloc: - - /* COPY EXCEPTION TRAMPOLINE -- copy the tramp to the - * exception address. Define CONFIG_ROM_STUBS to prevent - * the copy (e.g. exception in flash or in other - * softare/firmware component). - */ -#if !defined(CONFIG_ROM_STUBS) - movhi r4, %hi(_except_start) - ori r4, r4, %lo(_except_start) - movhi r5, %hi(_except_end) - ori r5, r5, %lo(_except_end) - movhi r6, %hi(CONFIG_SYS_EXCEPTION_ADDR) - ori r6, r6, %lo(CONFIG_SYS_EXCEPTION_ADDR) - beq r4, r6, 7f /* Skip if at proper addr */ - -6: ldwio r7, 0(r4) - stwio r7, 0(r6) - addi r4, r4, 4 - addi r6, r6, 4 - bne r4, r5, 6b -7: -#endif - - /* STACK INIT -- zero top two words for call back chain. - */ - movhi sp, %hi(CONFIG_SYS_INIT_SP) - ori sp, sp, %lo(CONFIG_SYS_INIT_SP) - addi sp, sp, -8 - stw r0, 0(sp) - stw r0, 4(sp) - mov fp, sp - - /* - * Call board_init -- never returns - */ - movhi r4, %hi(board_init@h) - ori r4, r4, %lo(board_init@h) - callr r4 - - /* NEVER RETURNS -- but branch to the _start just - * in case ;-) - */ - br _start - - -/* - * dly_clks -- Nios2 (like Nios1) doesn't have a timebase in - * the core. For simple delay loops, we do our best by counting - * instruction cycles. - * - * Instruction performance varies based on the core. For cores - * with icache and static/dynamic branch prediction (II/f, II/s): - * - * Normal ALU (e.g. add, cmp, etc): 1 cycle - * Branch (correctly predicted, taken): 2 cycles - * Negative offset is predicted (II/s). - * - * For cores without icache and no branch prediction (II/e): - * - * Normal ALU (e.g. add, cmp, etc): 6 cycles - * Branch (no prediction): 6 cycles - * - * For simplicity, if an instruction cache is implemented we - * assume II/f or II/s. Otherwise, we use the II/e. - * - */ - .globl dly_clks - -dly_clks: - -#if (CONFIG_SYS_ICACHE_SIZE > 0) - subi r4, r4, 3 /* 3 clocks/loop */ -#else - subi r4, r4, 12 /* 12 clocks/loop */ -#endif - bge r4, r0, dly_clks - ret - - -#if !defined(CONFIG_IDENT_STRING) -#define CONFIG_IDENT_STRING "" -#endif - .data - .globl version_string - -version_string: - .ascii U_BOOT_VERSION - .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")" - .ascii CONFIG_IDENT_STRING, "\0" diff --git a/cpu/nios2/sysid.c b/cpu/nios2/sysid.c deleted file mode 100644 index 77bc8b5..0000000 --- a/cpu/nios2/sysid.c +++ /dev/null @@ -1,58 +0,0 @@ -/* - * (C) Copyright 2004, Psyent Corporation <www.psyent.com> - * Scott McNutt <smcnutt@psyent.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> - -#if defined (CONFIG_SYS_NIOS_SYSID_BASE) - -#include <command.h> -#include <asm/io.h> -#include <nios2-io.h> -#include <linux/time.h> - -void display_sysid (void) -{ - struct nios_sysid_t *sysid = (struct nios_sysid_t *)CONFIG_SYS_NIOS_SYSID_BASE; - struct tm t; - char asc[32]; - time_t stamp; - - stamp = readl (&sysid->timestamp); - localtime_r (&stamp, &t); - asctime_r (&t, asc); - printf ("SYSID : %08lx, %s", readl (&sysid->id), asc); - -} - -int do_sysid (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) -{ - display_sysid (); - return (0); -} - -U_BOOT_CMD( - sysid, 1, 1, do_sysid, - "display Nios-II system id", - "" -); -#endif /* CONFIG_SYS_NIOS_SYSID_BASE */ diff --git a/cpu/nios2/traps.c b/cpu/nios2/traps.c deleted file mode 100644 index 3f1517d..0000000 --- a/cpu/nios2/traps.c +++ /dev/null @@ -1,42 +0,0 @@ -/* - * (C) Copyright 2004, Psyent Corporation <www.psyent.com> - * Scott McNutt <smcnutt@psyent.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 <asm/ptrace.h> -#include <common.h> - -void trap_handler (struct pt_regs *regs) -{ - /* Just issue warning */ - printf ("\n\n*** WARNING: unimplemented trap @ %08x\n\n", - regs->reg[29] - 4); -} - -void soft_emulation (struct pt_regs *regs) -{ - /* TODO: Software emulation of mul/div etc. Until this is - * implemented, generate warning and hang. - */ - printf ("\n\n*** ERROR: unimplemented instruction @ %08x\n", - regs->reg[29] - 4); - hang (); -} |