mb/qemu-{i440fx,q35}: Use POSTCAR stage to load the ramstage
Qemu does not have a real CAR but postcar stage is still useful for testing the stage. The postcar stage is also mandatory for x86_64 to setup pagetables for x86_64 ramstage. Do not set up MTRRs, as qemu ignores them anyways. Tested on qemu-i440fx and qemu-q35. Change-Id: I6638534d99fde312e55b6a6be8c95e4cb25cca80 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/30499 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
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@ -133,6 +133,7 @@ ramstage-y += wrdd.c
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ramstage-$(CONFIG_CONSOLE_CBMEM) += cbmem_console.c
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ramstage-$(CONFIG_BOOTSPLASH) += jpeg.c
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ramstage-$(CONFIG_TRACE) += trace.c
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postcar-$(CONFIG_TRACE) += trace.c
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ramstage-$(CONFIG_COLLECT_TIMESTAMPS) += timestamp.c
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ramstage-$(CONFIG_COVERAGE) += libgcov.c
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ramstage-y += edid.c
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@ -12,7 +12,8 @@ config BOARD_SPECIFIC_OPTIONS
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select BOARD_ROMSIZE_KB_256
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select MAINBOARD_HAS_NATIVE_VGA_INIT
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select MAINBOARD_FORCE_NATIVE_VGA_INIT
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select NO_CAR_GLOBAL_MIGRATION
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select POSTCAR_STAGE
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select POSTCAR_CONSOLE
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config MAINBOARD_DIR
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string
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@ -3,3 +3,6 @@ ramstage-y += fw_cfg.c
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romstage-y += fw_cfg.c
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romstage-y += memory.c
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ramstage-y += memory.c
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postcar-y += memory.c
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postcar-y += fw_cfg.c
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postcar-y += exit_car.S
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@ -0,0 +1,18 @@
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/*
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* This file is part of the coreboot project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; version 2 of
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* the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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.text
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.global chipset_teardown_car
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chipset_teardown_car:
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/* There's no CAR to tear down */
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ret
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@ -23,11 +23,25 @@
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asmlinkage void car_stage_entry(void)
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{
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struct postcar_frame pcf;
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console_init();
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cbmem_recovery(0);
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timestamp_add_now(TS_START_ROMSTAGE);
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run_ramstage();
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/**
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* The LZMA decoder needs about 4 KiB stack.
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* Leave 1 KiB stack for general postcar code.
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*/
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if (postcar_frame_init(&pcf, 5 * KiB))
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die("Unable to initialize postcar frame.\n");
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/**
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* Run postcar to tear down CAR and load relocatable ramstage.
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* There's no CAR on qemu, but for educational purposes and
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* testing the postcar stage is used on qemu, too.
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*/
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run_postcar_phase(&pcf);
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}
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@ -11,7 +11,8 @@ config BOARD_SPECIFIC_OPTIONS
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select BOARD_ROMSIZE_KB_2048
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select MAINBOARD_HAS_NATIVE_VGA_INIT
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select MAINBOARD_FORCE_NATIVE_VGA_INIT
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select NO_CAR_GLOBAL_MIGRATION
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select POSTCAR_STAGE
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select POSTCAR_CONSOLE
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config MAINBOARD_DIR
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string
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@ -3,4 +3,9 @@ ramstage-y += ../qemu-i440fx/memory.c
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ramstage-y += ../qemu-i440fx/fw_cfg.c
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romstage-y += ../qemu-i440fx/memory.c
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romstage-y += ../qemu-i440fx/fw_cfg.c
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postcar-y += ../qemu-i440fx/memory.c
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postcar-y += ../qemu-i440fx/exit_car.S
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postcar-y += ../qemu-i440fx/fw_cfg.c
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bootblock-y += bootblock.c
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@ -24,6 +24,7 @@
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asmlinkage void car_stage_entry(void)
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{
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struct postcar_frame pcf;
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i82801ix_early_init();
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console_init();
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@ -31,5 +32,18 @@ asmlinkage void car_stage_entry(void)
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timestamp_add_now(TS_START_ROMSTAGE);
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run_ramstage();
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/**
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* The LZMA decoder needs about 4 KiB stack.
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* Leave 1 KiB stack for general postcar code.
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*/
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if (postcar_frame_init(&pcf, 5 * KiB))
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die("Unable to initialize postcar frame.\n");
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/**
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* Run postcar to tear down CAR and load relocatable ramstage.
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* There's no CAR on qemu, but for educational purposes and
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* testing the postcar stage is used on qemu, too.
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*/
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run_postcar_phase(&pcf);
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}
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