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soc/amd/picasso: Add console & timestamp buffers to psp_verstage 

Create areas for console & timestamp data in psp_verstage and pass it to
the x86 to save for use later.

BUG=b:159220781
TEST=Build & Boot trembyle

Signed-off-by: Martin Roth <martin@coreboot.org>
Change-Id: I41c8d7a1565e761187e941d7d6021805a9744d06
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42830
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
This commit is contained in:
Martin Roth 2020-06-26 08:40:56 -06:00 committed by Patrick Georgi
parent 3818d03fa2
commit 0c12abe462
6 changed files with 94 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
src/include/symbols.h
View File

@ -60,6 +60,7 @@ DECLARE_REGION(framebuffer)
DECLARE_REGION(pdpt)
DECLARE_REGION(opensbi)
DECLARE_REGION(bl31)
DECLARE_REGION(transfer_buffer)
/*
* Put this into a .c file accessing a linker script region to mark that region

32
src/soc/amd/picasso/include/soc/psp_transfer.h Normal file
View File

@ -0,0 +1,32 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef PSP_VERSTAGE_PSP_TRANSFER_H
#define PSP_VERSTAGE_PSP_TRANSFER_H
#define TRANSFER_INFO_SIZE 64
#define TIMESTAMP_BUFFER_SIZE 0x200
#define TRANSFER_MAGIC_VAL 0x50544953
/* Area for things that would cause errors in a linker script */
#if !defined(__ASSEMBLER__)
#include <stdint.h>
struct transfer_info_struct {
uint32_t magic_val; /* Identifier */
uint32_t struct_bytes; /* Size of this structure */
uint32_t buffer_size; /* Size of the transfer buffer area */
/* Offsets from start of transfer buffer */
uint32_t workbuf_offset;
uint32_t console_offset;
uint32_t timestamp_offset;
uint32_t fmap_offset;
uint32_t unused[9]; /* Pad to 64 bytes */
};
_Static_assert(sizeof(struct transfer_info_struct) == TRANSFER_INFO_SIZE, \
"TRANSFER_INFO_SIZE is incorrect");
#endif
#endif /* PSP_VERSTAGE_PSP_TRANSFER_H */

14
src/soc/amd/picasso/memlayout_psp_verstage.ld
View File

@ -1,6 +1,8 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#include <memlayout.h>
#include <soc/psp_transfer.h>
#include <fmap_config.h>
/*
* Start of available space is 0x15000 and this is where the
@ -11,8 +13,6 @@
#define PSP_SRAM_SIZE 160K
#define VERSTAGE_START 0x15000
#define VBOOT_WORK_SIZE 12K
#define FMAP_CACHE_SIZE 2K
/*
* The temp stack can be made much smaller if needed - even 256 bytes
@ -52,9 +52,15 @@ SECTIONS
_everstage = .;
ALIGN_COUNTER(64)
REGION(vboot2_work, ., VBOOT_WORK_SIZE, 64)
_transfer_buffer = .;
REGION(transfer_info, ., TRANSFER_INFO_SIZE, 4)
ALIGN_COUNTER(64)
REGION(vboot2_work, ., VB2_FIRMWARE_WORKBUF_RECOMMENDED_SIZE, 64)
ALIGN_COUNTER(64)
PRERAM_CBMEM_CONSOLE(., CONFIG_PRERAM_CBMEM_CONSOLE_SIZE)
TIMESTAMP(., TIMESTAMP_BUFFER_SIZE)
FMAP_CACHE(., FMAP_SIZE)
_etransfer_buffer = .;
PSP_VERSTAGE_TEMP_STACK_END = (PSP_VERSTAGE_TEMP_STACK_START + PSP_VERSTAGE_TEMP_STACK_SIZE );

17
src/soc/amd/picasso/memlayout_x86.ld
View File

@ -2,6 +2,7 @@
#include <memlayout.h>
#include <arch/header.ld>
#include <soc/psp_transfer.h>
#define EARLY_RESERVED_DRAM_START(addr) SYMBOL(early_reserved_dram, addr)
#define EARLY_RESERVED_DRAM_END(addr) SYMBOL(eearly_reserved_dram, addr)
@ -38,14 +39,16 @@
* | Unused hole |
* +--------------------------------+
* | FMAP cache (FMAP_SIZE) |
* +--------------------------------+ PSP_SHAREDMEM_BASE + PSP_SHAREDMEM_SIZE + PRERAM_CBMEM_CONSOLE_SIZE + 0x200
* +--------------------------------+ PSP_SHAREDMEM_BASE + 0x40 + PSP_SHAREDMEM_SIZE + PRERAM_CBMEM_CONSOLE_SIZE + 0x200
* | Early Timestamp region (512B) |
* +--------------------------------+ PSP_SHAREDMEM_BASE + PSP_SHAREDMEM_SIZE + PRERAM_CBMEM_CONSOLE_SIZE
* +--------------------------------+ PSP_SHAREDMEM_BASE + 0x40 + PSP_SHAREDMEM_SIZE + PRERAM_CBMEM_CONSOLE_SIZE
* | Preram CBMEM console |
* | (PRERAM_CBMEM_CONSOLE_SIZE) |
* +--------------------------------+ PSP_SHAREDMEM_BASE + PSP_SHAREDMEM_SIZE
* +--------------------------------+ PSP_SHAREDMEM_BASE + 0x40 + PSP_SHAREDMEM_SIZE
* | PSP shared (vboot workbuf) |
* | (PSP_SHAREDMEM_SIZE) |
* +--------------------------------+ PSP_SHAREDMEM_BASE + 0x40
* | Transfer Info Structure |
* +--------------------------------+ PSP_SHAREDMEM_BASE
* | APOB (64KiB) |
* +--------------------------------+ PSP_APOB_DRAM_ADDRESS
@ -72,14 +75,18 @@ SECTIONS
#if CONFIG(VBOOT)
PSP_SHAREDMEM_DRAM_START(CONFIG_PSP_SHAREDMEM_BASE)
_transfer_buffer = .;
REGION(transfer_info, ., TRANSFER_INFO_SIZE, 4)
VBOOT2_WORK(., VB2_FIRMWARE_WORKBUF_RECOMMENDED_SIZE)
PSP_SHAREDMEM_DRAM_END(CONFIG_PSP_SHAREDMEM_BASE + CONFIG_PSP_SHAREDMEM_SIZE)
#endif
PRERAM_CBMEM_CONSOLE(., CONFIG_PRERAM_CBMEM_CONSOLE_SIZE)
TIMESTAMP(., 0x200)
TIMESTAMP(., TIMESTAMP_BUFFER_SIZE)
FMAP_CACHE(., FMAP_SIZE)
#if CONFIG(VBOOT)
_etransfer_buffer = .;
#endif
_ = ASSERT((CONFIG_BOOTBLOCK_ADDR + CONFIG_C_ENV_BOOTBLOCK_SIZE - 0x10) == CONFIG_X86_RESET_VECTOR, "Reset vector should be -0x10 from end of bootblock");
_ = ASSERT(CONFIG_BOOTBLOCK_ADDR == ((CONFIG_BOOTBLOCK_ADDR + 0xFFFF) & 0xFFFF0000), "Bootblock must be 16 bit aligned");
BOOTBLOCK(CONFIG_BOOTBLOCK_ADDR, CONFIG_C_ENV_BOOTBLOCK_SIZE)

38
src/soc/amd/picasso/psp_verstage/psp_verstage.c
View File

@ -8,6 +8,7 @@
#include <commonlib/region.h>
#include <console/console.h>
#include <fmap.h>
#include <soc/psp_transfer.h>
#include <security/vboot/misc.h>
#include <security/vboot/symbols.h>
#include <security/vboot/vboot_common.h>
@ -120,8 +121,9 @@ static uint32_t update_boot_region(struct vb2_context *ctx)
static uint32_t save_buffers(struct vb2_context **ctx)
{
uint32_t retval;
uint32_t buffer_size = DEFAULT_WORKBUF_TRANSFER_SIZE;
uint32_t buffer_size = MIN_TRANSFER_BUFFER_SIZE;
uint32_t max_buffer_size;
struct transfer_info_struct buffer_info = {0};
/*
* This should never fail, but if it does, we should still try to
@ -130,28 +132,47 @@ static uint32_t save_buffers(struct vb2_context **ctx)
if (svc_get_max_workbuf_size(&max_buffer_size)) {
post_code(POSTCODE_DEFAULT_BUFFER_SIZE_NOTICE);
printk(BIOS_NOTICE, "Notice: using default transfer buffer size.\n");
max_buffer_size = DEFAULT_WORKBUF_TRANSFER_SIZE;
max_buffer_size = MIN_TRANSFER_BUFFER_SIZE;
}
printk(BIOS_DEBUG, "\nMaximum buffer size: %d bytes\n", max_buffer_size);
retval = vb2api_relocate(_vboot2_work, _vboot2_work, buffer_size, ctx);
/* Shrink workbuf if MP2 is in use and cannot be used to save buffer */
if (max_buffer_size < VB2_FIRMWARE_WORKBUF_RECOMMENDED_SIZE) {
retval = vb2api_relocate(_vboot2_work, _vboot2_work, MIN_WORKBUF_TRANSFER_SIZE,
ctx);
if (retval != VB2_SUCCESS) {
printk(BIOS_ERR, "Error shrinking workbuf. Error code %#x\n", retval);
buffer_size = VB2_FIRMWARE_WORKBUF_RECOMMENDED_SIZE;
post_code(POSTCODE_WORKBUF_RESIZE_WARNING);
}
} else {
buffer_size =
(uint32_t)((uintptr_t)_etransfer_buffer - (uintptr_t)_transfer_buffer);
buffer_info.console_offset = (uint32_t)((uintptr_t)_preram_cbmem_console -
(uintptr_t)_transfer_buffer);
buffer_info.timestamp_offset = (uint32_t)((uintptr_t)_timestamp -
(uintptr_t)_transfer_buffer);
buffer_info.fmap_offset = (uint32_t)((uintptr_t)_fmap_cache -
(uintptr_t)_transfer_buffer);
}
if (buffer_size > max_buffer_size) {
printk(BIOS_ERR, "Error: Workbuf is larger than max buffer size.\n");
printk(BIOS_ERR, "Error: Buffer is larger than max buffer size.\n");
post_code(POSTCODE_WORKBUF_BUFFER_SIZE_ERROR);
return POSTCODE_WORKBUF_BUFFER_SIZE_ERROR;
}
retval = svc_save_uapp_data(UAPP_COPYBUF_CHROME_WORKBUF, (void *)_vboot2_work,
buffer_info.magic_val = TRANSFER_MAGIC_VAL;
buffer_info.struct_bytes = sizeof(buffer_info);
buffer_info.buffer_size = buffer_size;
buffer_info.workbuf_offset = (uint32_t)((uintptr_t)_fmap_cache -
(uintptr_t)_vboot2_work);
retval = svc_save_uapp_data(UAPP_COPYBUF_CHROME_WORKBUF, (void *)_transfer_buffer,
buffer_size);
if (retval) {
printk(BIOS_ERR, "Error: Could not save workbuf. Error code 0x%08x\n",
retval);
printk(BIOS_ERR, "Error: Could not save workbuf. Error code 0x%08x\n", retval);
return POSTCODE_WORKBUF_SAVE_ERROR;
}
@ -193,6 +214,9 @@ void Main(void)
verstage_main();
vb2api_relocate(_vboot2_work, _vboot2_work, VB2_FIRMWARE_WORKBUF_RECOMMENDED_SIZE,
&ctx);
post_code(POSTCODE_SAVE_BUFFERS);
retval = save_buffers(&ctx);
if (retval)

4
src/soc/amd/picasso/psp_verstage/psp_verstage.h
View File

@ -4,6 +4,7 @@
#define PSP_VERSTAGE_H
#include <stdint.h>
#include <soc/psp_transfer.h>
#define EMBEDDED_FW_SIGNATURE 0x55aa55aa
#define PSP_COOKIE 0x50535024 /* 'PSP$' */
@ -36,7 +37,8 @@
#define POSTCODE_LEAVING_VERSTAGE 0xF2
#define SPI_ADDR_MASK 0x00ffffff
#define DEFAULT_WORKBUF_TRANSFER_SIZE (8 * KiB)
#define MIN_TRANSFER_BUFFER_SIZE (8 * KiB)
#define MIN_WORKBUF_TRANSFER_SIZE (MIN_TRANSFER_BUFFER_SIZE - TRANSFER_INFO_SIZE)
struct psp_ef_table {
uint32_t signature; /* 0x55aa55aa */