changelog

bootloader源代码

#
# EM86XX boot loader change log
#

v0.1.0 : 12/10/2002 
    Supports UART and simple boot menu

v0.2.0 : 01/27/2003
    Compatible with MAMBO uClinux kernel
    Supports various method of booting (direct, romfs, initrd)
    Supports downloading image via serial

v0.3.0 : 02/04/2003
    Supports serial flash erase/programming
    Create another bootloader for serial flash (standalone)

v0.3.1 : 02/06/2003
    Reserve 0x04 - 0x3f area in the boot loader for serial flash for configuration area
    PLL, and other DRAM settings locate starting from offset 0x10 (file offset : 0x14)

v0.3.2 : 02/10/2003
    Connects FlexROM III via Peripheral Bus CS#2, and supports booting from FlexROM. 
    I guess also Parallel Flash work. 

v0.4.0 : 02/10/2003
    Supports PCI host functionality

v0.4.1 : 02/13/2003
    PCI test 

v0.4.2 : 02/20/2003
    PCI code reorganized. 
    pci scan/select/info/(test) submenu
    for release version (CONFIG_RELEASE), supports CONFIG_BOOTFROM_xxx configuration

v0.5.0 : 03/24/2003
    IDE support
    Supports booting from IDE
    Basic MAMBO primitive functions : interrupt, MBUS, switchbox

v0.5.1 : 03/24/2003
    separate each serial flash drive (ST : sflash-st.c)

v0.5.2 : 03/24/2003
    Supports parallel flash (through Common Flash Interface)
    Flash codes are ported from Jasper boot loader, and not tested under Mambo

v0.5.3 : 04/01/2003
    IDE DMA transfer

v0.5.4 : 04/03/2003
    PCI DMA transfer test
    cache control 

v0.5.5 : 04/08/2003
    data restore after flash probing
    flush cache after boot
    disable cache for host area in developement version

v0.5.6 : 04/16/2003
    disable data cache before booting kernel
    setup r0, r1 before jumping to kernel

v0.5.7 : 04/19/2003
    config cache <on|off>

v0.6.0 : 04/22/2003
    Serial flash support : SST 25VF512
    'MAMB' signature

v0.6.1 : 04/24/2003
    Confirmed booting from IDE (for HP)
        Disabled multi-mode. I'm not sure it's working. 

v0.6.2 : 04/24/2003
    Serial flash support : SST 25VF512/010/020/040

v0.6.3 : 04/28/2003
    Reorganized configuration area. Assign 0x60 bytes for configuration
    Transfer configuration data from serial flash area to DRAM area
    Make bootsflash to be consistent with boot loader configuration area
    Check file size and copy only needed part of boot loader

v0.6.4 : 05/02/2003
    Implemented IDE multi-mode writing. Enabled multi-mode
    Added IDE test function.

v0.6.5 : 05/07/2003
    Detects bootable image in IDE device
    Added bootflag to configuration area
        boot depends on bootflag

v0.6.6 05/14/2003
    Reserved 512 bytes for stage 0 boot loader
    Merged stage 0 boot loaders to loader-stage0.S
    Tested stage 0 boot loader for parallel flash
    Every changes are made to loader-stage0.S

v0.6.7 05/21/2003
    Maps GPIO 6 to IRQ for IDE interrupt

v0.7.0 06/03/2003
    "download serial [target] gz command" for which allows downloading gzipped image
    flash support : 8 bits data lines
    make it possible to enable or disable each function groups (SFLASH FLASH IDE PCI NET)
    on the way of porting NE2000 PCI device driver
    IRQ support

v0.7.1 06/06/2003
    Adjust the heap location for inflate() function. Currently loader uses 8MB of
    memory and the actual memory size is bigger than 8MB, it uses the memory from
    8MB for heap.

v0.7.2 06/10/2003
    Move MAMBO_DRAMBASE definition to version.h which is automatically generated by Makefile

v0.7.3 06/19/2003
    Distinguish booting from serial flash and parallel flash

v0.7.4 06/25/2003
    Added delay cycle while writing image into SST-series serial flash for safety
    Check signature before writing boot loader image into serial / parallel flash
    Reduced delay while burning flash
    Make use of unlock bypass programming even MaxBufSize = 0. Tested with AM29LV3200.
    Even transferring 64KB by bypassing mode is OK. default = 4KB (2^12 bytes)
    
v0.7.5 07/11/2003
    Changed the serial flash timing : 0x0e => 0x0f
    Moved default configuration parameters to config.h 
    Generate another binary with initialization-only boot loader (tried to make it 
    smaller than 512 bytes). It includes every initialization needed by Mambo kernel
    "info romfs" command
    do not check "IDE device READY" while probing IDE bus. CD-ROM is not ready at boot time

v0.8.0 : 08/15/2003
    CONFIG_ENABLE_FULLFUNCTION : To removed not frequently used functions by default. 
    CONFIG_ENABLE_PCIPB : PCI through FPGA by Northwest Logic
    shortcut / batch commands
    Do not initialize DRAM 1 controller if the parameter is 0
    fixed inflate() hang problem : when the unzipped image is bigger than 1MB
    "info sflash/pb/dram" command
    DRAM base address has moved to 0x11000000 by default
    UART configurations have moved from uart.h to Makefile (DEFAULT_UART_xxx)
    TESTLOADERONRAM configuration has moved from config.h to Makefile
    "ide test all" command to test IDE interface. fixed MBUS transfer address mask
    PCI FPGA has been tested (not DMA mode transfer)

v0.8.1 : 08/20/2003
    support DEL as BS
    "ppci test config" has been moved to pci common test

v0.8.2 : 08/20/2003
    configvalid field is introduced to configuration space. 
    If the appropriate bit is not set, PCI configuration is not updated.
    EM86xx Rev B has different Revision ID (2), and it prevent from the data is overwritten
    burnsflash is also modified to support this configvalid bits

v0.8.3 : 09/12/2003
    do not invalidate cache for the address space lower than 256MB
    Mambo PCI : select() function writes just needed bytes
        for compatibility with Rev B
        PCI scan will work better on Rev B
    boot command can specify kernel base address
    Maintains multiple kernel image in one partition

v0.8.4 : 09/23/2003
    write back cache control
    fix boot_ide() bug

0.8.5 : 09/29/2003
    setup Mambo as PCI slave to support PCI bus mastering
    fix base address in devices' configuration space
    support virt_to_bus and bus_to_virt function
    move TX sk_buff to BSS which resides in DMAable memory
    fix timer 0 (divice by 512 not by 256)
    rename function names starting with pcihost_ with pcimambo_

0.9.0 : 10/14/2003
    New cache setting : 2GB non-cached, 2GB cached
    Moved DRAMBASE to 0x91000000
    Define new LOADER_DRAMBASE to 0x91a00000
    Removed CRs from loader.S
    "sflash force" command
    Checks image size before flashing (serial flash / parallel flash)
    Read partition table when it probes drive
    Has separate configuration file for each boards or vendor 
    If the configuration file (.config) is not found, copy from default configuration (defconfig)
    Also Makefile support user configuration file through "CONFIG=" option at command line
    Clears BSS section at bootup
    Moved unnecessary functions under "CONFIG_ENABLE_FULLFUNCTION"
    PCI / flash / sflash code cleanup
    Removed unnecessary memset() because the BSS was not cleared
    Gathered all the necessary initialization code to mambo_init()
    New memory map is adapted to remove 64KB size limitation of boot loader
        0x91000000 : vector table
        0x91000000 - 0x91800000 : various image
        0x91800000 - 0x91a00000 : heap for inflate()
        0x91a00000 - 0x92000000 : boot loader, heap, stack

0.9.1 : 10/16/2003
    Disable instruction cache for regions below 2GB
    Set timeout to 1 second. Some legacy HDD needs time to get stable after
        setting transfer mode.
    pci_init() passes correct PCI structure depending on configuration

0.9.2 : 10/24/2003
    Have ENABLE_SFLASH_ST and ENABLE_SFLASH_SST configuration
    Added DRAM size information in the configuration. defconfig is changed.
    Kernel parameter passing through reserved memory area
        0x91000100 - 0x91000200 (256 bytes)
        Only pass command line tag.
        "config cmd" option for specifying command line parameter
    loader.bin memory map :
        0x00 - 0x20 : ARM vector table
        0x20 - 0x40 : ARM vector jump addresses
        0x40 - 0xa0 : configuration from stage 0 boot loader
        0xa0 - 0x100 : reserved
        0x100 - 0x200 : kernel parameter

v0.9.3 : 10/30/2003
    Added board specific header files : board
        board-generic : generic Sigma Designs' boards
    Added rtl81xx.c. It has only skeleton of RTL81xx ethernet driver

v0.9.4 : 11/10/2003
    serial flash M25P05 and M25P10 supports 128 bytes of page program. 
        M25P40 supports 256 bytes. Set PAGEPROGRAM size to 128 (before 256)
    supports ST M95xxx serial flashes
        renamed sflash-st.c to sflash-st-m25.c
        newly created sflash-st-m95.c for M95xxx series
    Renamed : 
        pcihost.* => pcimambo.*
    supports "Production Support"
        Stage 0 Test : Run directly on ROM (serial or parallel flash)
            use Mambo internal memory for stack purpose
            DRAM test : Data Line / Address Line / Entire Memory
        Stage 1 Test : Run after initialization is done
            Checksum : checksum is 2's complement of the sum of the image
                ignore first 4 bytes of serial flash image (signature)
        Support board specific test
        make PRODUCTIONTEST=y

v0.9.5 : 11/17/2003
    Fix the production test bug : it referred to configuration in RAM not ROM
    Reimplementation of 'vsprintf' from scratch (about 1000 bytes but much smaller