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author | Subrata Banik <subratabanik@google.com> | 2024-09-27 14:48:04 +0530 |
---|---|---|
committer | Subrata Banik <subratabanik@google.com> | 2024-10-02 03:06:02 +0000 |
commit | 2f8bee7d544be7d75e29d36e6b7425aa74223a1a (patch) | |
tree | c8bab3a4a346c2bbe62658cb651a502118aa33a6 /src/device/mdio.c | |
parent | e5cce0055239b3c73ea5220c122e183694091ab6 (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/mdio.c')
0 files changed, 0 insertions, 0 deletions