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author | fishsoupisgood <github@madingley.org> | 2019-04-29 01:17:54 +0100 |
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committer | fishsoupisgood <github@madingley.org> | 2019-05-27 03:43:43 +0100 |
commit | 3f2546b2ef55b661fd8dd69682b38992225e86f6 (patch) | |
tree | 65ca85f13617aee1dce474596800950f266a456c /roms/u-boot/board/qemu-mips | |
download | qemu-master.tar.gz qemu-master.tar.bz2 qemu-master.zip |
Diffstat (limited to 'roms/u-boot/board/qemu-mips')
-rw-r--r-- | roms/u-boot/board/qemu-mips/Makefile | 9 | ||||
-rw-r--r-- | roms/u-boot/board/qemu-mips/lowlevel_init.S | 40 | ||||
-rw-r--r-- | roms/u-boot/board/qemu-mips/qemu-mips.c | 79 |
3 files changed, 128 insertions, 0 deletions
diff --git a/roms/u-boot/board/qemu-mips/Makefile b/roms/u-boot/board/qemu-mips/Makefile new file mode 100644 index 00000000..8040573f --- /dev/null +++ b/roms/u-boot/board/qemu-mips/Makefile @@ -0,0 +1,9 @@ +# +# (C) Copyright 2003-2006 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-y = qemu-mips.o +obj-y += lowlevel_init.o diff --git a/roms/u-boot/board/qemu-mips/lowlevel_init.S b/roms/u-boot/board/qemu-mips/lowlevel_init.S new file mode 100644 index 00000000..b0f70727 --- /dev/null +++ b/roms/u-boot/board/qemu-mips/lowlevel_init.S @@ -0,0 +1,40 @@ +/* Memory sub-system initialization code */ + +#include <config.h> +#include <asm/regdef.h> +#include <asm/mipsregs.h> + + .text + .set noreorder + .set mips32 + + .globl lowlevel_init +lowlevel_init: + + /* + * Step 2) Establish Status Register + * (set BEV, clear ERL, clear EXL, clear IE) + */ + li t1, 0x00400000 + mtc0 t1, CP0_STATUS + + /* + * Step 3) Establish CP0 Config0 + * (set K0=3) + */ + li t1, 0x00000003 + mtc0 t1, CP0_CONFIG + + /* + * Step 7) Establish Cause + * (set IV bit) + */ + li t1, 0x00800000 + mtc0 t1, CP0_CAUSE + + /* Establish Wired (and Random) */ + mtc0 zero, CP0_WIRED + nop + + jr ra + nop diff --git a/roms/u-boot/board/qemu-mips/qemu-mips.c b/roms/u-boot/board/qemu-mips/qemu-mips.c new file mode 100644 index 00000000..563044eb --- /dev/null +++ b/roms/u-boot/board/qemu-mips/qemu-mips.c @@ -0,0 +1,79 @@ +/* + * (C) Copyright 2007 + * Vlad Lungu vlad.lungu@windriver.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <command.h> +#include <asm/mipsregs.h> +#include <asm/io.h> +#include <netdev.h> + +phys_size_t initdram(int board_type) +{ + /* Sdram is setup by assembler code */ + /* If memory could be changed, we should return the true value here */ + return MEM_SIZE*1024*1024; +} + +int checkboard(void) +{ + u32 proc_id; + u32 config1; + + proc_id = read_c0_prid(); + printf("Board: Qemu -M mips CPU: "); + switch (proc_id) { + case 0x00018000: + printf("4Kc"); + break; + case 0x00018400: + printf("4KEcR1"); + break; + case 0x00019000: + printf("4KEc"); + break; + case 0x00019300: + config1 = read_c0_config1(); + if (config1 & 1) + printf("24Kf"); + else + printf("24Kc"); + break; + case 0x00019500: + printf("34Kf"); + break; + case 0x00000400: + printf("R4000"); + break; + case 0x00018100: + config1 = read_c0_config1(); + if (config1 & 1) + printf("5Kf"); + else + printf("5Kc"); + break; + case 0x000182a0: + printf("20Kc"); + break; + + default: + printf("unknown"); + } + printf(" proc_id=0x%x\n", proc_id); + + return 0; +} + +int misc_init_r(void) +{ + set_io_port_base(0); + return 0; +} + +int board_eth_init(bd_t *bis) +{ + return ne2k_register(); +} |