diff options
author | Bin Meng <bmeng.cn@gmail.com> | 2015-05-07 13:34:08 (GMT) |
---|---|---|
committer | Simon Glass <sjg@chromium.org> | 2015-06-04 08:39:38 (GMT) |
commit | a65b25d148fb0a9ef7dd5fba4ae2709f5bcae0c6 (patch) | |
tree | ddbf28ac4f0a34f5c8b62b80f59a0a93db645a01 /arch/x86/cpu/qemu | |
parent | 238fe16c40f640e5b78828b21990a0565f408813 (diff) | |
download | u-boot-a65b25d148fb0a9ef7dd5fba4ae2709f5bcae0c6.tar.xz |
x86: Support QEMU x86 targets
This commit introduces the initial U-Boot support for QEMU x86 targets.
U-Boot can boot from coreboot as a payload, or directly without coreboot.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Merged in patch 'x86: qemu: Add CMD_NET to qemu-x86_defconfig
https://patchwork.ozlabs.org/patch/479745/
Diffstat (limited to 'arch/x86/cpu/qemu')
-rw-r--r-- | arch/x86/cpu/qemu/Kconfig | 21 | ||||
-rw-r--r-- | arch/x86/cpu/qemu/Makefile | 8 | ||||
-rw-r--r-- | arch/x86/cpu/qemu/car.S | 26 | ||||
-rw-r--r-- | arch/x86/cpu/qemu/dram.c | 46 | ||||
-rw-r--r-- | arch/x86/cpu/qemu/pci.c | 49 | ||||
-rw-r--r-- | arch/x86/cpu/qemu/qemu.c | 37 |
6 files changed, 187 insertions, 0 deletions
diff --git a/arch/x86/cpu/qemu/Kconfig b/arch/x86/cpu/qemu/Kconfig new file mode 100644 index 0000000..fb775d7 --- /dev/null +++ b/arch/x86/cpu/qemu/Kconfig @@ -0,0 +1,21 @@ +# +# Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> +# +# SPDX-License-Identifier: GPL-2.0+ +# + +config QEMU + bool + select TSC_CALIBRATION_BYPASS + +if QEMU + +config SYS_CAR_ADDR + hex + default 0xd0000 + +config SYS_CAR_SIZE + hex + default 0x10000 + +endif diff --git a/arch/x86/cpu/qemu/Makefile b/arch/x86/cpu/qemu/Makefile new file mode 100644 index 0000000..be79723 --- /dev/null +++ b/arch/x86/cpu/qemu/Makefile @@ -0,0 +1,8 @@ +# +# Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-y += car.o dram.o qemu.o +obj-$(CONFIG_PCI) += pci.o diff --git a/arch/x86/cpu/qemu/car.S b/arch/x86/cpu/qemu/car.S new file mode 100644 index 0000000..13b3aea --- /dev/null +++ b/arch/x86/cpu/qemu/car.S @@ -0,0 +1,26 @@ +/* + * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <config.h> +#include <asm/post.h> + +.globl car_init +car_init: + /* Save the BIST result */ + movl %eax, %ebp + + post_code(POST_CAR_START) + + /* + * Since we know we are running inside emulator, + * we can do nothing here for CAR initialization. + */ + + /* Restore the BIST result */ + movl %ebp, %eax + + post_code(POST_CAR_CPU_CACHE) + jmp car_init_ret diff --git a/arch/x86/cpu/qemu/dram.c b/arch/x86/cpu/qemu/dram.c new file mode 100644 index 0000000..a88d0d2 --- /dev/null +++ b/arch/x86/cpu/qemu/dram.c @@ -0,0 +1,46 @@ +/* + * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/post.h> +#include <asm/arch/qemu.h> + +DECLARE_GLOBAL_DATA_PTR; + +int dram_init(void) +{ + u32 ram; + + outb(HIGH_RAM_ADDR, CMOS_ADDR_PORT); + ram = ((u32)inb(CMOS_DATA_PORT)) << 14; + outb(LOW_RAM_ADDR, CMOS_ADDR_PORT); + ram |= ((u32)inb(CMOS_DATA_PORT)) << 6; + ram += 16 * 1024; + + gd->ram_size = ram * 1024; + post_code(POST_DRAM); + + return 0; +} + +void dram_init_banksize(void) +{ + gd->bd->bi_dram[0].start = 0; + gd->bd->bi_dram[0].size = gd->ram_size; +} + +/* + * This function looks for the highest region of memory lower than 4GB which + * has enough space for U-Boot where U-Boot is aligned on a page boundary. + * It overrides the default implementation found elsewhere which simply + * picks the end of ram, wherever that may be. The location of the stack, + * the relocation address, and how far U-Boot is moved by relocation are + * set in the global data structure. + */ +ulong board_get_usable_ram_top(ulong total_size) +{ + return gd->ram_size; +} diff --git a/arch/x86/cpu/qemu/pci.c b/arch/x86/cpu/qemu/pci.c new file mode 100644 index 0000000..d50ab75 --- /dev/null +++ b/arch/x86/cpu/qemu/pci.c @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <pci.h> + +DECLARE_GLOBAL_DATA_PTR; + +void board_pci_setup_hose(struct pci_controller *hose) +{ + hose->first_busno = 0; + hose->last_busno = 0; + + /* PCI memory space */ + pci_set_region(hose->regions + 0, + CONFIG_PCI_MEM_BUS, + CONFIG_PCI_MEM_PHYS, + CONFIG_PCI_MEM_SIZE, + PCI_REGION_MEM); + + /* PCI IO space */ + pci_set_region(hose->regions + 1, + CONFIG_PCI_IO_BUS, + CONFIG_PCI_IO_PHYS, + CONFIG_PCI_IO_SIZE, + PCI_REGION_IO); + + pci_set_region(hose->regions + 2, + CONFIG_PCI_PREF_BUS, + CONFIG_PCI_PREF_PHYS, + CONFIG_PCI_PREF_SIZE, + PCI_REGION_PREFETCH); + + pci_set_region(hose->regions + 3, + 0, + 0, + gd->ram_size, + PCI_REGION_MEM | PCI_REGION_SYS_MEMORY); + + hose->region_count = 4; +} + +int board_pci_post_scan(struct pci_controller *hose) +{ + return 0; +} diff --git a/arch/x86/cpu/qemu/qemu.c b/arch/x86/cpu/qemu/qemu.c new file mode 100644 index 0000000..0f98476 --- /dev/null +++ b/arch/x86/cpu/qemu/qemu.c @@ -0,0 +1,37 @@ +/* + * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/post.h> +#include <asm/processor.h> + +int arch_cpu_init(void) +{ + int ret; + + post_code(POST_CPU_INIT); +#ifdef CONFIG_SYS_X86_TSC_TIMER + timer_set_base(rdtsc()); +#endif + + ret = x86_cpu_init_f(); + if (ret) + return ret; + + return 0; +} + +int print_cpuinfo(void) +{ + post_code(POST_CPU_INFO); + return default_print_cpuinfo(); +} + +void reset_cpu(ulong addr) +{ + /* cold reset */ + x86_full_reset(); +} |