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authorFelix Held <felix-coreboot@felixheld.de>2023-04-28 17:30:59 +0200
committerMatt DeVillier <matt.devillier@amd.corp-partner.google.com>2023-05-03 16:15:38 +0000
commit662d7af70bc8e060921f57aaec328619382b4852 (patch)
tree8253e813ab34e1a46ab4591cbbce1c414109e063 /src/soc/amd/common/block/lpc/lpc.c
parent22b226724e71822d81d142a866f892dd0949e954 (diff)
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soc/amd/common/block/lpc/lpc: report mapped SPI flash as MMIO range
Since the 16MByte of memory-mapped SPI flash region right below the 4GB boundary is both a fixed region and isn't decoded on a device below the LPC device, but assumed to be decoded by the LPC device itself, it shouldn't be reported as a subtractive resource, but as an MMIO resource instead. TEST=On mandolin the 16MByte MMIO-mapped SPI flash now show up as a reserved region in the e820 memory map which wasn't the case before: 13. 00000000ff000000-00000000ffffffff: RESERVED The Linux kernel doesn't show any new or possibly related errors. Signed-off-by: Felix Held <felix-coreboot@felixheld.de> Suggested-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Change-Id: Ib52df2b2d79a1e6213c3499984a5a1e0e25c058a Reviewed-on: https://review.coreboot.org/c/coreboot/+/74839 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com> Reviewed-by: Martin L Roth <gaumless@gmail.com> Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com> Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Diffstat (limited to 'src/soc/amd/common/block/lpc/lpc.c')
-rw-r--r--src/soc/amd/common/block/lpc/lpc.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/src/soc/amd/common/block/lpc/lpc.c b/src/soc/amd/common/block/lpc/lpc.c
index 1fbff532fd2f..b8fb923c72a5 100644
--- a/src/soc/amd/common/block/lpc/lpc.c
+++ b/src/soc/amd/common/block/lpc/lpc.c
@@ -117,11 +117,8 @@ static void lpc_read_resources(struct device *dev)
IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
/* Only up to 16 MByte of the SPI flash can be mapped right below 4 GB */
- res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0));
- res->base = FLASH_BELOW_4GB_MAPPING_REGION_BASE;
- res->size = FLASH_BELOW_4GB_MAPPING_REGION_SIZE;
- res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE |
- IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
+ mmio_range(dev, 1, FLASH_BELOW_4GB_MAPPING_REGION_BASE,
+ FLASH_BELOW_4GB_MAPPING_REGION_SIZE);
/* Add a memory resource for the SPI BAR. */
mmio_range(dev, 2, SPI_BASE_ADDRESS, 1 * KiB);