u-boot/include/configs/favr-32-ezkit.h
Haavard Skinnemoen 1f36f73fe7 avr32: Add simple paging support
Use the MMU hardware to set up 1:1 mappings between physical and virtual
addresses. This allows us to bypass the cache when accessing the flash
without having to do any physical-to-virtual address mapping in the CFI
driver.

The virtual memory mappings are defined at compile time through a sorted
array of virtual memory range objects. When a TLB miss exception
happens, the exception handler does a binary search through the array
until it finds a matching entry and loads it into the TLB. The u-boot
image itself is covered by a fixed TLB entry which is never replaced.

This makes the 'saveenv' command work again on ATNGW100 and other boards
using the CFI driver, hopefully without breaking any rules.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2010-09-03 15:13:02 +02:00

205 lines
5.7 KiB
C

/*
* Copyright (C) 2008 Atmel Corporation
*
* Configuration settings for the Favr-32 EarthLCD LCD kit.
*
* 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
*/
#ifndef __CONFIG_H
#define __CONFIG_H
#include <asm/arch/memory-map.h>
#define CONFIG_AVR32 1
#define CONFIG_AT32AP 1
#define CONFIG_AT32AP7000 1
#define CONFIG_FAVR32_EZKIT 1
#define CONFIG_FAVR32_EZKIT_EXT_FLASH 1
/*
* Timer clock frequency. We're using the CPU-internal COUNT register
* for this, so this is equivalent to the CPU core clock frequency
*/
#define CONFIG_SYS_HZ 1000
/*
* Set up the PLL to run at 140 MHz, the CPU to run at the PLL
* frequency, the HSB and PBB at 1/2, and the PBA to run at 1/4 the
* PLL frequency.
* (CONFIG_SYS_OSC0_HZ * CONFIG_SYS_PLL0_MUL) / CONFIG_SYS_PLL0_DIV = PLL MHz
*/
#define CONFIG_PLL 1
#define CONFIG_SYS_POWER_MANAGER 1
#define CONFIG_SYS_OSC0_HZ 20000000
#define CONFIG_SYS_PLL0_DIV 1
#define CONFIG_SYS_PLL0_MUL 7
#define CONFIG_SYS_PLL0_SUPPRESS_CYCLES 16
/*
* Set the CPU running at:
* PLL / (2^CONFIG_SYS_CLKDIV_CPU) = CPU MHz
*/
#define CONFIG_SYS_CLKDIV_CPU 0
/*
* Set the HSB running at:
* PLL / (2^CONFIG_SYS_CLKDIV_HSB) = HSB MHz
*/
#define CONFIG_SYS_CLKDIV_HSB 1
/*
* Set the PBA running at:
* PLL / (2^CONFIG_SYS_CLKDIV_PBA) = PBA MHz
*/
#define CONFIG_SYS_CLKDIV_PBA 2
/*
* Set the PBB running at:
* PLL / (2^CONFIG_SYS_CLKDIV_PBB) = PBB MHz
*/
#define CONFIG_SYS_CLKDIV_PBB 1
/* Reserve VM regions for SDRAM and NOR flash */
#define CONFIG_SYS_NR_VM_REGIONS 2
/*
* The PLLOPT register controls the PLL like this:
* icp = PLLOPT<2>
* ivco = PLLOPT<1:0>
*
* We want icp=1 (default) and ivco=0 (80-160 MHz) or ivco=2 (150-240MHz).
*/
#define CONFIG_SYS_PLL0_OPT 0x04
#undef CONFIG_USART0
#undef CONFIG_USART1
#undef CONFIG_USART2
#define CONFIG_USART3 1
/* User serviceable stuff */
#define CONFIG_DOS_PARTITION 1
#define CONFIG_CMDLINE_TAG 1
#define CONFIG_SETUP_MEMORY_TAGS 1
#define CONFIG_INITRD_TAG 1
#define CONFIG_STACKSIZE (2048)
#define CONFIG_BAUDRATE 115200
#define CONFIG_BOOTARGS \
"root=/dev/mtdblock1 rootfstype=jffs fbmem=1800k"
#define CONFIG_BOOTCOMMAND \
"fsload; bootm $(fileaddr)"
/*
* Only interrupt autoboot if <space> is pressed. Otherwise, garbage
* data on the serial line may interrupt the boot sequence.
*/
#define CONFIG_BOOTDELAY 1
#define CONFIG_AUTOBOOT 1
#define CONFIG_AUTOBOOT_KEYED 1
#define CONFIG_AUTOBOOT_PROMPT \
"Press SPACE to abort autoboot in %d seconds\n", bootdelay
#define CONFIG_AUTOBOOT_DELAY_STR "d"
#define CONFIG_AUTOBOOT_STOP_STR " "
/*
* After booting the board for the first time, new ethernet addresses
* should be generated and assigned to the environment variables
* "ethaddr" and "eth1addr". This is normally done during production.
*/
#define CONFIG_OVERWRITE_ETHADDR_ONCE 1
#define CONFIG_NET_MULTI 1
/*
* BOOTP options
*/
#define CONFIG_BOOTP_SUBNETMASK
#define CONFIG_BOOTP_GATEWAY
/*
* Command line configuration.
*/
#include <config_cmd_default.h>
#define CONFIG_CMD_ASKENV
#define CONFIG_CMD_DHCP
#define CONFIG_CMD_EXT2
#define CONFIG_CMD_FAT
#define CONFIG_CMD_JFFS2
#define CONFIG_CMD_MMC
#undef CONFIG_CMD_FPGA
#undef CONFIG_CMD_SETGETDCR
#undef CONFIG_CMD_SOURCE
#undef CONFIG_CMD_XIMG
#define CONFIG_ATMEL_USART 1
#define CONFIG_MACB 1
#define CONFIG_PORTMUX_PIO 1
#define CONFIG_SYS_NR_PIOS 5
#define CONFIG_SYS_HSDRAMC 1
#define CONFIG_MMC 1
#define CONFIG_ATMEL_MCI 1
#define CONFIG_SYS_DCACHE_LINESZ 32
#define CONFIG_SYS_ICACHE_LINESZ 32
#define CONFIG_NR_DRAM_BANKS 1
/* External flash on Favr-32 */
#if 0
#define CONFIG_SYS_FLASH_CFI 1
#define CONFIG_FLASH_CFI_DRIVER 1
#endif
#define CONFIG_SYS_FLASH_BASE 0x00000000
#define CONFIG_SYS_FLASH_SIZE 0x800000
#define CONFIG_SYS_MAX_FLASH_BANKS 1
#define CONFIG_SYS_MAX_FLASH_SECT 135
#define CONFIG_SYS_MONITOR_BASE CONFIG_SYS_FLASH_BASE
#define CONFIG_SYS_INTRAM_BASE INTERNAL_SRAM_BASE
#define CONFIG_SYS_INTRAM_SIZE INTERNAL_SRAM_SIZE
#define CONFIG_SYS_SDRAM_BASE EBI_SDRAM_BASE
#define CONFIG_ENV_IS_IN_FLASH 1
#define CONFIG_ENV_SIZE 65536
#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_SYS_FLASH_SIZE - CONFIG_ENV_SIZE)
#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_INTRAM_BASE + CONFIG_SYS_INTRAM_SIZE)
#define CONFIG_SYS_MALLOC_LEN (256*1024)
#define CONFIG_SYS_DMA_ALLOC_LEN (16384)
/* Allow 4MB for the kernel run-time image */
#define CONFIG_SYS_LOAD_ADDR (EBI_SDRAM_BASE + 0x00400000)
#define CONFIG_SYS_BOOTPARAMS_LEN (16 * 1024)
/* Other configuration settings that shouldn't have to change all that often */
#define CONFIG_SYS_PROMPT "U-Boot> "
#define CONFIG_SYS_CBSIZE 256
#define CONFIG_SYS_MAXARGS 16
#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + sizeof(CONFIG_SYS_PROMPT) + 16)
#define CONFIG_SYS_LONGHELP 1
#define CONFIG_SYS_MEMTEST_START EBI_SDRAM_BASE
#define CONFIG_SYS_MEMTEST_END (CONFIG_SYS_MEMTEST_START + 0x700000)
#define CONFIG_SYS_BAUDRATE_TABLE { 115200, 38400, 19200, 9600, 2400 }
#endif /* __CONFIG_H */