mirror of
https://github.com/AsahiLinux/u-boot
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cdb749778a
While running from flash, i. e. before relocation, we have only a limited C runtime environment without writable data segment. In this phase, some configurations (for example with environment in EEPROM) must not use the normal getenv(), but a special function. This function had been called getenv_r(), with the idea that the "_r" suffix would mean the same as in the _r_eentrant versions of some of the C library functions (for example getdate vs. getdate_r, getgrent vs. getgrent_r, etc.). Unfortunately this was a misleading name, as in U-Boot the "_r" generally means "running from RAM", i. e. _after_ relocation. To avoid confusion, rename into getenv_f() [as "running from flash"] Signed-off-by: Wolfgang Denk <wd@denx.de> Acked-by: Detlev Zundel <dzu@denx.de>
294 lines
7.6 KiB
C
294 lines
7.6 KiB
C
/*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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* Keith Outwater, keith_outwater@mvis.com
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <virtex2.h>
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#include <common.h>
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#include <mpc8xx.h>
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#include <asm/8xx_immap.h>
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#include "beeper.h"
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#include "fpga.h"
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#include "ioport.h"
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DECLARE_GLOBAL_DATA_PTR;
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#ifdef CONFIG_STATUS_LED
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#include <status_led.h>
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#endif
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#if defined(CONFIG_CMD_MII) && defined(CONFIG_MII)
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#include <net.h>
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#endif
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#if 0
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#define GEN860T_DEBUG
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#endif
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#ifdef GEN860T_DEBUG
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#define PRINTF(fmt,args...) printf (fmt ,##args)
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#else
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#define PRINTF(fmt,args...)
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#endif
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/*
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* The following UPM init tables were generated automatically by
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* Motorola's MCUINIT program. See the README file for UPM to
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* SDRAM pin assignments if you want to type this data into
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* MCUINIT in order to reverse engineer the waveforms.
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*/
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/*
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* UPM initialization tables for MICRON MT48LC16M16A2TG SDRAM devices
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* (UPMA) and Virtex FPGA SelectMap interface (UPMB).
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* NOTE that unused areas of the table are used to hold NOP, precharge
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* and mode register set sequences.
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*
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*/
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#define UPMA_NOP_ADDR 0x5
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#define UPMA_PRECHARGE_ADDR 0x6
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#define UPMA_MRS_ADDR 0x12
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#define UPM_SINGLE_READ_ADDR 0x00
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#define UPM_BURST_READ_ADDR 0x08
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#define UPM_SINGLE_WRITE_ADDR 0x18
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#define UPM_BURST_WRITE_ADDR 0x20
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#define UPM_REFRESH_ADDR 0x30
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const uint sdram_upm_table[] = {
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/* single read (offset 0x00 in upm ram) */
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0x0e0fdc04, 0x01adfc04, 0x0fbffc00, 0x1fff5c05,
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0xffffffff, 0x0fffffcd, 0x0fff0fce, 0xefcfffff,
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/* burst read (offset 0x08 in upm ram) */
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0x0f0fdc04, 0x00fdfc04, 0xf0fffc00, 0xf0fffc00,
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0xf1fffc00, 0xfffffc00, 0xfffffc05, 0xffffffff,
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0xffffffff, 0xffffffff, 0x0ffffff4, 0x1f3d5ff4,
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0xfffffff4, 0xfffffff5, 0xffffffff, 0xffffffff,
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/* single write (offset 0x18 in upm ram) */
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0x0f0fdc04, 0x00ad3c00, 0x1fff5c05, 0xffffffff,
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0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
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/* burst write (offset 0x20 in upm ram) */
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0x0f0fdc00, 0x10fd7c00, 0xf0fffc00, 0xf0fffc00,
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0xf1fffc04, 0xfffffc05, 0xffffffff, 0xffffffff,
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0xffffffff, 0xffffffff, 0xffffffff, 0xfffff7ff,
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0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
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/* refresh (offset 0x30 in upm ram) */
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0x1ffddc84, 0xfffffc04, 0xfffffc04, 0xfffffc84,
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0xfffffc05, 0xffffffff, 0xffffffff, 0xffffffff,
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0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
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/* exception (offset 0x3C in upm ram) */
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};
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const uint selectmap_upm_table[] = {
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/* single read (offset 0x00 in upm ram) */
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0x88fffc06, 0x00fff404, 0x00fffc04, 0x33fffc00,
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0xfffffc05, 0xffffffff, 0xffffffff, 0xffffffff,
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/* burst read (offset 0x08 in upm ram) */
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0xfffffc04, 0xfffffc05, 0xffffffff, 0xffffffff,
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0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
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0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
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0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
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/* single write (offset 0x18 in upm ram) */
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0x88fffc04, 0x00fff400, 0x77fffc05, 0xffffffff,
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0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
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/* burst write (offset 0x20 in upm ram) */
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0xfffffc04, 0xfffffc05, 0xffffffff, 0xffffffff,
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0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
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0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
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0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
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/* refresh (offset 0x30 in upm ram) */
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0xfffffc04, 0xfffffc05, 0xffffffff, 0xffffffff,
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0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
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0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
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/* exception (offset 0x3C in upm ram) */
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0xfffffc05, 0xffffffff, 0xffffffff, 0xffffffff
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};
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/*
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* Check board identity. Always successful (gives information only)
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*/
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int checkboard (void)
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{
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char *s;
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char buf[64];
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int i;
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i = getenv_f("board_id", buf, sizeof (buf));
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s = (i > 0) ? buf : NULL;
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if (s) {
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printf ("%s ", s);
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} else {
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printf ("<unknown> ");
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}
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i = getenv_f("serial#", buf, sizeof (buf));
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s = (i > 0) ? buf : NULL;
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if (s) {
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printf ("S/N %s\n", s);
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} else {
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printf ("S/N <unknown>\n");
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}
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printf ("CPU at %s MHz, ", strmhz (buf, gd->cpu_clk));
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printf ("local bus at %s MHz\n", strmhz (buf, gd->bus_clk));
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return (0);
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}
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/*
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* Initialize SDRAM
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*/
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phys_size_t initdram (int board_type)
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{
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volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
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volatile memctl8xx_t *memctl = &immr->im_memctl;
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upmconfig (UPMA,
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(uint *) sdram_upm_table,
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sizeof (sdram_upm_table) / sizeof (uint)
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);
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/*
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* Setup MAMR register
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*/
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memctl->memc_mptpr = CONFIG_SYS_MPTPR_1BK_8K;
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memctl->memc_mamr = CONFIG_SYS_MAMR_8COL & (~(MAMR_PTAE)); /* no refresh yet */
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/*
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* Map CS1* to SDRAM bank
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*/
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memctl->memc_or1 = CONFIG_SYS_OR1;
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memctl->memc_br1 = CONFIG_SYS_BR1;
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/*
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* Perform SDRAM initialization sequence:
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* 1. Apply at least one NOP command
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* 2. 100 uS delay (JEDEC standard says 200 uS)
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* 3. Issue 4 precharge commands
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* 4. Perform two refresh cycles
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* 5. Program mode register
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*
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* Program SDRAM for standard operation, sequential burst, burst length
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* of 4, CAS latency of 2.
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*/
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memctl->memc_mar = 0x00000000;
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memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
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MCR_MLCF (0) | UPMA_NOP_ADDR;
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udelay (200);
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memctl->memc_mar = 0x00000000;
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memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
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MCR_MLCF (4) | UPMA_PRECHARGE_ADDR;
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memctl->memc_mar = 0x00000000;
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memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
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MCR_MLCF (2) | UPM_REFRESH_ADDR;
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memctl->memc_mar = 0x00000088;
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memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
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MCR_MLCF (1) | UPMA_MRS_ADDR;
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memctl->memc_mar = 0x00000000;
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memctl->memc_mcr = MCR_UPM_A | MCR_OP_RUN | MCR_MB_CS1 |
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MCR_MLCF (0) | UPMA_NOP_ADDR;
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/*
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* Enable refresh
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*/
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memctl->memc_mamr |= MAMR_PTAE;
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return (SDRAM_SIZE);
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}
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/*
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* Disk On Chip (DOC) Millenium initialization.
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* The DOC lives in the CS2* space
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*/
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#if defined(CONFIG_CMD_DOC)
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void doc_init (void)
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{
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printf ("Probing at 0x%.8x: ", DOC_BASE);
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doc_probe (DOC_BASE);
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}
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#endif
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/*
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* Miscellaneous intialization
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*/
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int misc_init_r (void)
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{
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volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
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volatile memctl8xx_t *memctl = &immr->im_memctl;
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/*
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* Set up UPMB to handle the Virtex FPGA SelectMap interface
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*/
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upmconfig (UPMB, (uint *) selectmap_upm_table,
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sizeof (selectmap_upm_table) / sizeof (uint));
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memctl->memc_mbmr = 0x0;
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config_mpc8xx_ioports (immr);
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#if defined(CONFIG_CMD_MII)
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mii_init ();
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#endif
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#if defined(CONFIG_FPGA)
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gen860t_init_fpga ();
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#endif
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return 0;
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}
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/*
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* Final init hook before entering command loop.
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*/
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int last_stage_init (void)
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{
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#if !defined(CONFIG_SC)
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char buf[256];
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int i;
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/*
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* Turn the beeper volume all the way down in case this is a warm boot.
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*/
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set_beeper_volume (-64);
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init_beeper ();
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/*
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* Read the environment to see what to do with the beeper
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*/
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i = getenv_f("beeper", buf, sizeof (buf));
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if (i > 0) {
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do_beeper (buf);
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}
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#endif
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return 0;
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}
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/*
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* Stub to make POST code happy. Can't self-poweroff, so just hang.
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*/
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void board_poweroff (void)
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{
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puts ("### Please power off the board ###\n");
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while (1);
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}
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