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author | Jonas Gorski <jogo@openwrt.org> | 2014-08-01 21:56:31 +0000 |
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committer | Jonas Gorski <jogo@openwrt.org> | 2014-08-01 21:56:31 +0000 |
commit | 701e2a38fef4fce862eaeb21fc97874a6387a569 (patch) | |
tree | ff25cf2649946ea51b35d435138362c84e8129e7 /target/linux/brcm63xx/image/lzma-loader/src/board.c | |
parent | 21845cb45da7b6da12fe977b38bfa68d4f72d9c1 (diff) | |
download | mtk-20170518-701e2a38fef4fce862eaeb21fc97874a6387a569.zip mtk-20170518-701e2a38fef4fce862eaeb21fc97874a6387a569.tar.gz mtk-20170518-701e2a38fef4fce862eaeb21fc97874a6387a569.tar.bz2 |
brcm63xx: add working lzma-loader and use it for initramfs
Add a working lzma loader and use it for generating initramfs kernels
to allow easily netbooting elf kernels on devices with a 4 MiB CFE
size limit.
Based on ar71xx's lzma-loader.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
SVN-Revision: 41940
Diffstat (limited to 'target/linux/brcm63xx/image/lzma-loader/src/board.c')
-rw-r--r-- | target/linux/brcm63xx/image/lzma-loader/src/board.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/image/lzma-loader/src/board.c b/target/linux/brcm63xx/image/lzma-loader/src/board.c new file mode 100644 index 0000000..1c715e3 --- /dev/null +++ b/target/linux/brcm63xx/image/lzma-loader/src/board.c @@ -0,0 +1,103 @@ +/* + * BCM63XX specific implementation parts + * + * Copyright (C) 2014 Jonas Gorski <jogo@openwrt.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +#include <stddef.h> +#include "config.h" +#include "cp0regdef.h" + +#define READREG(r) *(volatile unsigned int *)(r) +#define WRITEREG(r,v) *(volatile unsigned int *)(r) = v + +#define UART_IR_REG 0x10 +#define UART_FIFO_REG 0x14 + +unsigned long uart_base; + +static void wait_xfered(void) +{ + unsigned int val; + + do { + val = READREG(uart_base + UART_IR_REG); + if (val & (1 << 5)) + break; + } while (1); +} + +void board_putc(int ch) +{ + if (!uart_base) + return; + + wait_xfered(); + WRITEREG(uart_base + UART_FIFO_REG, ch); + wait_xfered(); +} + +#define PRID_IMP_BMIPS32_REV4 0x4000 +#define PRID_IMP_BMIPS32_REV8 0x8000 +#define PRID_IMP_BMIPS3300 0x9000 +#define PRID_IMP_BMIPS3300_ALT 0x9100 +#define PRID_IMP_BMIPS3300_BUG 0x0000 +#define PRID_IMP_BMIPS43XX 0xa000 + +void board_init(void) +{ + unsigned long prid, chipid, chipid_reg; + + prid = read_32bit_c0_register($15, 0); + + switch (prid & 0xff00) { + case PRID_IMP_BMIPS32_REV4: + case PRID_IMP_BMIPS32_REV8: + case PRID_IMP_BMIPS3300_ALT: + case PRID_IMP_BMIPS3300_BUG: + chipid_reg = 0xfffe0000; + break; + case PRID_IMP_BMIPS3300: + if ((prid & 0xff) >= 0x33) + chipid_reg = 0xb0000000; + else + chipid_reg = 0xfffe0000; + break; + case PRID_IMP_BMIPS43XX: + if ((prid & 0xff) >= 0x30) + chipid_reg = 0xb0000000; + else + chipid_reg = 0xfffe0000; + break; + default: + return; + } + + chipid = READREG(chipid_reg); + + switch (chipid >> 16) { + case 0x6318: + case 0x6328: + case 0x6358: + case 0x6362: + case 0x6368: + case 0x6369: + uart_base = chipid_reg + 0x100; + break; + case 0x6316: + case 0x6326: + uart_base = chipid_reg + 0x180; + break; + case 0x6338: + case 0x6345: + case 0x6348: + uart_base = chipid_reg + 0x300; + break; + default: + return; + } +} |