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coreboot-kgpe-d16/src/include/rules.h
Arthur Heymans 9efb0c0825 arch/x86: Only use .bss from car.ld when running XIP 
Some platform run early stages like romstage and verstage from CAR
instead of XIP. This allows to link them like other arch inside the
_program region. This make in place LZ4 decompression possible as it
needs a bit of extra place to extract the code which is now provided by
the .bss.

Tested on up/squared (Intel APL).

Change-Id: I6cf51f943dde5f642d75ba4c5d3be520dc56370a
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48156
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-by: Nico Huber <nico.h@gmx.de>
2022-10-20 14:43:40 +00:00

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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef _RULES_H
#define _RULES_H
#if defined(__TEST__)
#define ENV_TEST 1
#else
#define ENV_TEST 0
#endif
#if defined(__TIMELESS__)
#define ENV_TIMELESS 1
#else
#define ENV_TIMELESS 0
#endif
/* Useful helpers to tell whether the code is executing in bootblock,
* romstage, ramstage or SMM.
*/
#if defined(__DECOMPRESSOR__)
#define ENV_DECOMPRESSOR 1
#define ENV_BOOTBLOCK 0
#define ENV_ROMSTAGE 0
#define ENV_RAMSTAGE 0
#define ENV_SMM 0
#define ENV_SEPARATE_VERSTAGE 0
#define ENV_RMODULE 0
#define ENV_POSTCAR 0
#define ENV_LIBAGESA 0
#define ENV_STRING "decompressor"
#elif defined(__BOOTBLOCK__)
#define ENV_DECOMPRESSOR 0
#define ENV_BOOTBLOCK 1
#define ENV_ROMSTAGE 0
#define ENV_RAMSTAGE 0
#define ENV_SMM 0
#define ENV_SEPARATE_VERSTAGE 0
#define ENV_RMODULE 0
#define ENV_POSTCAR 0
#define ENV_LIBAGESA 0
#define ENV_STRING "bootblock"
#elif defined(__ROMSTAGE__)
#define ENV_DECOMPRESSOR 0
#define ENV_BOOTBLOCK 0
#define ENV_ROMSTAGE 1
#define ENV_RAMSTAGE 0
#define ENV_SMM 0
#define ENV_SEPARATE_VERSTAGE 0
#define ENV_RMODULE 0
#define ENV_POSTCAR 0
#define ENV_LIBAGESA 0
#define ENV_STRING "romstage"
#elif defined(__SMM__)
#define ENV_DECOMPRESSOR 0
#define ENV_BOOTBLOCK 0
#define ENV_ROMSTAGE 0
#define ENV_RAMSTAGE 0
#define ENV_SMM 1
#define ENV_SEPARATE_VERSTAGE 0
#define ENV_RMODULE 0
#define ENV_POSTCAR 0
#define ENV_LIBAGESA 0
#define ENV_STRING "smm"
/*
* NOTE: "verstage" code may either run as a separate stage or linked into the
* bootblock/romstage, depending on the setting of the VBOOT_SEPARATE_VERSTAGE
* kconfig option. The ENV_SEPARATE_VERSTAGE macro will only return true for
* "verstage" code when CONFIG(VBOOT_SEPARATE_VERSTAGE) is true, otherwise that
* code will have ENV_BOOTBLOCK or ENV_ROMSTAGE set (depending on the
* "VBOOT_STARTS_IN_"... kconfig options).
*/
#elif defined(__VERSTAGE__)
#define ENV_DECOMPRESSOR 0
#define ENV_BOOTBLOCK 0
#define ENV_ROMSTAGE 0
#define ENV_RAMSTAGE 0
#define ENV_SMM 0
#define ENV_SEPARATE_VERSTAGE 1
#define ENV_RMODULE 0
#define ENV_POSTCAR 0
#define ENV_LIBAGESA 0
#if CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK)
#define ENV_STRING "verstage-before-bootblock"
#else
#define ENV_STRING "verstage"
#endif
#elif defined(__RAMSTAGE__)
#define ENV_DECOMPRESSOR 0
#define ENV_BOOTBLOCK 0
#define ENV_ROMSTAGE 0
#define ENV_RAMSTAGE 1
#define ENV_SMM 0
#define ENV_SEPARATE_VERSTAGE 0
#define ENV_RMODULE 0
#define ENV_POSTCAR 0
#define ENV_LIBAGESA 0
#define ENV_STRING "ramstage"
#elif defined(__RMODULE__)
#define ENV_DECOMPRESSOR 0
#define ENV_BOOTBLOCK 0
#define ENV_ROMSTAGE 0
#define ENV_RAMSTAGE 0
#define ENV_SMM 0
#define ENV_SEPARATE_VERSTAGE 0
#define ENV_RMODULE 1
#define ENV_POSTCAR 0
#define ENV_LIBAGESA 0
#define ENV_STRING "rmodule"
#elif defined(__POSTCAR__)
#define ENV_DECOMPRESSOR 0
#define ENV_BOOTBLOCK 0
#define ENV_ROMSTAGE 0
#define ENV_RAMSTAGE 0
#define ENV_SMM 0
#define ENV_SEPARATE_VERSTAGE 0
#define ENV_RMODULE 0
#define ENV_POSTCAR 1
#define ENV_LIBAGESA 0
#define ENV_STRING "postcar"
#elif defined(__LIBAGESA__)
#define ENV_DECOMPRESSOR 0
#define ENV_BOOTBLOCK 0
#define ENV_ROMSTAGE 0
#define ENV_RAMSTAGE 0
#define ENV_SMM 0
#define ENV_SEPARATE_VERSTAGE 0
#define ENV_RMODULE 0
#define ENV_POSTCAR 0
#define ENV_LIBAGESA 1
#define ENV_STRING "libagesa"
#else
/*
* Default case of nothing set for random blob generation using
* create_class_compiler that isn't bound to a stage.
*/
#define ENV_DECOMPRESSOR 0
#define ENV_BOOTBLOCK 0
#define ENV_ROMSTAGE 0
#define ENV_RAMSTAGE 0
#define ENV_SMM 0
#define ENV_SEPARATE_VERSTAGE 0
#define ENV_RMODULE 0
#define ENV_POSTCAR 0
#define ENV_LIBAGESA 0
#define ENV_STRING "UNKNOWN"
#endif
/* Define helpers about the current architecture, based on toolchain.inc. */
#if defined(__ARCH_arm__)
#define ENV_ARM 1
#define ENV_ARM64 0
#if __COREBOOT_ARM_ARCH__ == 4
#define ENV_ARMV4 1
#define ENV_ARMV7 0
#elif __COREBOOT_ARM_ARCH__ == 7
#define ENV_ARMV4 0
#define ENV_ARMV7 1
#if defined(__COREBOOT_ARM_V7_A__)
#define ENV_ARMV7_A 1
#define ENV_ARMV7_M 0
#define ENV_ARMV7_R 0
#elif defined(__COREBOOT_ARM_V7_M__)
#define ENV_ARMV7_A 0
#define ENV_ARMV7_M 1
#define ENV_ARMV7_R 0
#elif defined(__COREBOOT_ARM_V7_R__)
#define ENV_ARMV7_A 0
#define ENV_ARMV7_M 0
#define ENV_ARMV7_R 1
#endif
#else
#define ENV_ARMV4 0
#define ENV_ARMV7 0
#endif
#define ENV_ARMV8 0
#define ENV_RISCV 0
#define ENV_X86 0
#define ENV_X86_32 0
#define ENV_X86_64 0
#elif defined(__ARCH_arm64__)
#define ENV_ARM 0
#define ENV_ARM64 1
#define ENV_ARMV4 0
#define ENV_ARMV7 0
#if __COREBOOT_ARM_ARCH__ == 8
#define ENV_ARMV8 1
#else
#define ENV_ARMV8 0
#endif
#define ENV_RISCV 0
#define ENV_X86 0
#define ENV_X86_32 0
#define ENV_X86_64 0
#elif defined(__ARCH_riscv__)
#define ENV_ARM 0
#define ENV_ARM64 0
#define ENV_ARMV4 0
#define ENV_ARMV7 0
#define ENV_ARMV8 0
#define ENV_RISCV 1
#define ENV_X86 0
#define ENV_X86_32 0
#define ENV_X86_64 0
#elif defined(__ARCH_x86_32__)
#define ENV_ARM 0
#define ENV_ARM64 0
#define ENV_ARMV4 0
#define ENV_ARMV7 0
#define ENV_ARMV8 0
#define ENV_RISCV 0
#define ENV_X86 1
#define ENV_X86_32 1
#define ENV_X86_64 0
#elif defined(__ARCH_x86_64__)
#define ENV_ARM 0
#define ENV_ARM64 0
#define ENV_ARMV4 0
#define ENV_ARMV7 0
#define ENV_ARMV8 0
#define ENV_RISCV 0
#define ENV_X86 1
#define ENV_X86_32 0
#define ENV_X86_64 1
#else
#define ENV_ARM 0
#define ENV_ARM64 0
#define ENV_ARMV4 0
#define ENV_ARMV7 0
#define ENV_ARMV8 0
#define ENV_RISCV 0
#define ENV_X86 0
#define ENV_X86_32 0
#define ENV_X86_64 0
#endif
#if CONFIG(RAMPAYLOAD)
/* ENV_PAYLOAD_LOADER is set to ENV_POSTCAR when CONFIG_RAMPAYLOAD is enabled */
#define ENV_PAYLOAD_LOADER ENV_POSTCAR
#else
/* ENV_PAYLOAD_LOADER is set when you are in a stage that loads the payload.
* For now, that is the ramstage. */
#define ENV_PAYLOAD_LOADER ENV_RAMSTAGE
#endif
#define ENV_ROMSTAGE_OR_BEFORE \
(ENV_DECOMPRESSOR || ENV_BOOTBLOCK || ENV_ROMSTAGE || \
(ENV_SEPARATE_VERSTAGE && !CONFIG(VBOOT_STARTS_IN_ROMSTAGE)))
#if ENV_X86
/* Indicates memory layout is determined with arch/x86/car.ld. */
#define ENV_CACHE_AS_RAM (ENV_ROMSTAGE_OR_BEFORE && !CONFIG(RESET_VECTOR_IN_RAM))
/* No .data sections with execute-in-place from ROM. */
#define ENV_HAS_DATA_SECTION !ENV_CACHE_AS_RAM
#else
/* Both .data and .bss, sometimes SRAM not DRAM. */
#define ENV_HAS_DATA_SECTION 1
#define ENV_CACHE_AS_RAM 0
#endif
/* Indicates if the stage uses the _bss region defined in arch/x86/car.ld */
#define ENV_SEPARATE_BSS (ENV_CACHE_AS_RAM && (ENV_BOOTBLOCK || !CONFIG(NO_XIP_EARLY_STAGES)))
/* Currently rmodules, ramstage and smm have heap. */
#define ENV_HAS_HEAP_SECTION (ENV_RMODULE || ENV_RAMSTAGE || ENV_SMM)
/* Set USER_SPACE in the makefile for the rare code that runs in userspace */
#if defined(__USER_SPACE__)
#define ENV_USER_SPACE 1
#else
#define ENV_USER_SPACE 0
#endif
/* Define the first stage to run */
#if CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK)
#define ENV_INITIAL_STAGE ENV_SEPARATE_VERSTAGE
#else
#define ENV_INITIAL_STAGE ENV_BOOTBLOCK
#endif
#define ENV_CREATES_CBMEM ENV_ROMSTAGE
#define ENV_HAS_CBMEM (ENV_ROMSTAGE | ENV_POSTCAR | ENV_RAMSTAGE)
#define ENV_RAMINIT ENV_ROMSTAGE
#if ENV_X86
#define ENV_HAS_SPINLOCKS !ENV_ROMSTAGE_OR_BEFORE
#elif ENV_RISCV
#define ENV_HAS_SPINLOCKS 1
#else
#define ENV_HAS_SPINLOCKS 0
#endif
/* When set <arch/smp/spinlock.h> is included for the spinlock implementation. */
#define ENV_SUPPORTS_SMP (CONFIG(SMP) && ENV_HAS_SPINLOCKS)
#if ENV_X86 && CONFIG(COOP_MULTITASKING) && (ENV_RAMSTAGE || ENV_ROMSTAGE)
/* TODO: Enable in all x86 stages */
#define ENV_SUPPORTS_COOP 1
#else
#define ENV_SUPPORTS_COOP 0
#endif
/**
* For pre-DRAM stages and post-CAR always build with simple device model, ie.
* PCI, PNP and CPU functions operate without use of devicetree. The reason
* post-CAR utilizes __SIMPLE_DEVICE__ is for simplicity. Currently there's
* no known requirement that devicetree would be needed during that stage.
*
* For ramstage individual source file may define __SIMPLE_DEVICE__
* before including any header files to force that particular source
* be built with simple device model.
*/
#if !ENV_RAMSTAGE
#define __SIMPLE_DEVICE__
#endif
#endif /* _RULES_H */
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