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vc/amd/fsp/morgana/FspmUpd: don't use pointers for usb_phy config 

The size of a pointer changes between a 32 and 64 bit coreboot build. In
order to be able to use a 32 bit FSP in a 64 bit coreboot build, change
the pointer in the UPDs to a uint32_t to always have a 32 bit field in
the UPD for this. Also make sure that the address of the lcl_usb_phy
struct is located below the 4GB boundary, so that the truncation to 32
bits won't result in pointing to a different memory location than
intended. In this error case, which I don't expect to happen, print an
error and write 0 to mcfg->usb_phy_ptr so that the FSP will use its
default values.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I1394aa6ef5f401e0c7bdd4861f1e28ae46e56e4f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70505
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Felix Held 2022-12-08 19:14:43 +01:00 committed by Eric Lai
parent 4f30539b47
commit bd9ab06808
2 changed files with 11 additions and 3 deletions
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11
src/soc/amd/morgana/fsp_m_params.c
View File

@ -7,6 +7,7 @@
#include <amdblocks/ioapic.h>
#include <amdblocks/memmap.h>
#include <assert.h>
#include <console/console.h>
#include <console/uart.h>
#include <device/device.h>
#include <fsp/api.h>
@ -158,9 +159,15 @@ void platform_fsp_memory_init_params_cb(FSPM_UPD *mupd, uint32_t version)
lcl_usb_phy.Version_Major = FSP_USB_STRUCT_MAJOR_VERSION;
lcl_usb_phy.Version_Minor = FSP_USB_STRUCT_MINOR_VERSION;
lcl_usb_phy.TableLength = sizeof(struct usb_phy_config);
mcfg->usb_phy = &lcl_usb_phy;
if ((uintptr_t)&lcl_usb_phy <= UINT32_MAX) {
mcfg->usb_phy_ptr = (uint32_t)(uintptr_t)&lcl_usb_phy;
} else {
printk(BIOS_ERR, "USB PHY config struct above 4GB; can't pass USB PHY "
"configuration to 32 bit FSP.\n");
mcfg->usb_phy_ptr = 0;
}
} else {
mcfg->usb_phy = NULL;
mcfg->usb_phy_ptr = 0;
}
fsp_fill_pcie_ddi_descriptors(mcfg);

3
src/vendorcode/amd/fsp/morgana/FspmUpd.h
View File

@ -96,7 +96,8 @@ typedef struct __packed {
/** Offset 0x04CF**/ uint32_t telemetry_vddcrsocfull_scale_current;
/** Offset 0x04D3**/ uint32_t telemetry_vddcrsocOffset;
/** Offset 0x04D7**/ uint8_t UnusedUpdSpace1;
/** Offset 0x04D8**/ struct usb_phy_config *usb_phy;
/* usb_phy_ptr is actually struct usb_phy_config *, but that won't work for 64bit coreboot */
/** Offset 0x04D8**/ uint32_t usb_phy_ptr;
/** Offset 0x04DC**/ uint8_t UnusedUpdSpace2[292];
/** Offset 0x0600**/ uint16_t UpdTerminator;
} FSP_M_CONFIG;