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authorSubrata Banik <subratabanik@google.com>2024-09-27 14:48:04 +0530
committerSubrata Banik <subratabanik@google.com>2024-10-02 03:06:02 +0000
commit2f8bee7d544be7d75e29d36e6b7425aa74223a1a (patch)
treec8bab3a4a346c2bbe62658cb651a502118aa33a6 /src/device/mmio.c
parente5cce0055239b3c73ea5220c122e183694091ab6 (diff)
soc/intel: Deprecate SoC-specific global reset status configs
This change removes the SoC-specific `FSP_STATUS_GLOBAL_RESET_REQUIRED_X` Kconfigs, as they are no longer necessary for handling FSP global reset requests. Previously, these Kconfigs were used to select a specific 32-bit reset status code. However, with the introduction of FSP 2.4 and 64-bit interfaces, the global reset status code can now vary between architectures. To address this, the FSP driver now sets the `FSP_STATUS_GLOBAL_RESET` config to a common default value (depending upon most commonly used global reset status code) based on the interface: - 0x40000003 for 32-bit FSP interfaces - 0x4000000000000003 for 64-bit FSP interfaces This default can be overridden if an FSP implementation uses a different status code (for example: Apollo Lake selects different FSP reset status code as 0x40000005). By removing the SoC-specific configurations, this change simplifies global reset handling and ensures compatibility across different FSP versions and platforms. Below table shows the relationship between Platform, FSP and FSP Global Reset Status: +-----------------+--------------+-------------------------+ | Platform | FSP | Global Reset Status | +-----------------+--------------+-------------------------+ | Alder Lake | 32-bit | 0x40000003 | +-----------------+--------------+-------------------------+ | Apollo Lake | 32-bit | 0x40000005 | +-----------------+--------------+-------------------------+ | Cannon Lake | 32-bit | 0x40000003 | +-----------------+--------------+-------------------------+ | Elkhart Lake | 32-bit | 0x40000003 | +-----------------+--------------+-------------------------+ | Jasper Lake | 32-bit | 0x40000003 | +-----------------+--------------+-------------------------+ | Meteor Lake | 32-bit | 0x40000003 | +-----------------+--------------+-------------------------+ | Sky Lake | 32-bit | 0x40000003 | +-----------------+--------------+-------------------------+ | Tiger Lake | 32-bit | 0x40000003 | +-----------------+--------------+-------------------------+ | Panther Lake | 64-bit | 0x4000000000000003 | +-----------------+--------------+-------------------------+ BUG=b:347669091 TEST=Verified FSP requested global reset functionality on google/rex0 (32-bit) and google/rex64 (64-bit) platforms. w/ 32-bit FSP: ``` (Wdt) AllowKnownReset [FspResetSystem2] FSP Reset Initiated FSP returning control to Bootloader with reset required return status 40000003 FSPS, status=0x40000003 FSP: handling reset type, status=0x40000003 GLOBAL RESET! global_reset() called! HECI: Global Reset(Type:1) Command ``` w/ 64-bit FSP: ``` (Wdt) AllowKnownReset [FspResetSystem2] FSP Reset Initiated FSP returning control to Bootloader with reset required return status 3 FSPS, status=0x4000000000000003 FSP: handling reset type, status=0x4000000000000003 GLOBAL RESET! global_reset() called! HECI: Global Reset(Type:1) Command ``` Change-Id: I32bdbf7ea6afa7d5e5f91ea96d887719d26a593f Signed-off-by: Subrata Banik <subratabanik@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/84572 Reviewed-by: Christian Walter <christian.walter@9elements.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Karthik Ramasubramanian <kramasub@google.com> Reviewed-by: Jayvik Desai <jayvik@google.com>
Diffstat (limited to 'src/device/mmio.c')
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