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soc/intel/common/systemagent: Reserve window used for extended BIOS decoding 

This change reserves the window used for extended BIOS decoding as a
fixed MMIO resource using read_resources callback in systemagent
driver. This ensures that the resource allocator does not allocate
from this window.

Additionally, this window is also marked as fixed memory region in
_CRS for PNP0C02 device.

BUG=b:171534504

Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: I42b5a0ebda2627f72b825551c566cd22dbc5cca7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48184
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
This commit is contained in:
Furquan Shaikh 2020-11-25 14:30:15 -08:00
parent 886f4e862a
commit b53280ab53
2 changed files with 10 additions and 0 deletions
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5
src/soc/intel/common/block/acpi/acpi/northbridge.asl
View File

@ -276,6 +276,11 @@ Device (PDRC)
/* FLASH range */
Memory32Fixed (ReadOnly, 0, CONFIG_ROM_SIZE, FIOH)
#if CONFIG(FAST_SPI_SUPPORTS_EXT_BIOS_WINDOW)
/* Extended BIOS window */
Memory32Fixed (ReadOnly, CONFIG_EXT_BIOS_WIN_BASE, CONFIG_EXT_BIOS_WIN_SIZE)
#endif
/* Local APIC range(0xFEE0_0000 to 0xFEEF_FFFF) */
Memory32Fixed (ReadOnly, 0xFEE00000, 0x100000)

5
src/soc/intel/common/block/systemagent/systemagent.c
View File

@ -287,6 +287,11 @@ static void systemagent_read_resources(struct device *dev)
if (CONFIG(SA_ENABLE_IMR))
/* Add the isolated memory ranges (IMRs). */
sa_add_imr_resources(dev, &index);
/* Reserve the window used for extended BIOS decoding. */
if (CONFIG(FAST_SPI_SUPPORTS_EXT_BIOS_WINDOW))
mmio_resource(dev, index++, CONFIG_EXT_BIOS_WIN_BASE / KiB,
CONFIG_EXT_BIOS_WIN_SIZE / KiB);
}
void enable_power_aware_intr(void)