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soc/amd/cezanne, vc/amd/fsp/*: Add support for CCP DMA SVC call

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Add support to access the boot device from PSP through Crypto
Co-Processor (CCP) DMA. Implement a SVC call to use CCP DMA on SoCs
where it is supported and a stub on SoCs where it is not supported. This
provides an improved performance while accessing the boot device and
reduces the boot time by ~45 ms.

BUG=b:194990811
TEST=Build and boot to OS in guybrush. Perform cold and warm reboot
cycling for 250 iterations.

Change-Id: I02b94a842190ac4dcf45ff2d846b8665f06a9c75
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57562
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
This commit is contained in:
Karthikeyan Ramasubramanian
2021-09-10 11:36:21 -06:00
committed by Felix Held
parent 4012388736
commit b3ffff87dd
3 changed files with 36 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
src/soc/amd/cezanne/psp_verstage/svc.c
View File

@ -126,3 +126,10 @@ uint32_t svc_modexp(struct mod_exp_params *mod_exp_param)
SVC_CALL1(SVC_MODEXP, mod_exp_param, retval); SVC_CALL1(SVC_MODEXP, mod_exp_param, retval);
return retval; return retval;
} }
uint32_t svc_ccp_dma(uint32_t spi_rom_offset, void *dest, uint32_t size)
{
uint32_t retval = 0;
SVC_CALL3(SVC_CCP_DMA, spi_rom_offset, dest, size, retval);
return retval;
}

13
src/vendorcode/amd/fsp/cezanne/include/bl_uapp/bl_syscall_public.h
View File

@ -49,6 +49,7 @@
#define SVC_RESET_SYSTEM 0x67 #define SVC_RESET_SYSTEM 0x67
#define SVC_READ_TIMER_VAL 0x68 #define SVC_READ_TIMER_VAL 0x68
#define SVC_SHA 0x69 #define SVC_SHA 0x69
#define SVC_CCP_DMA 0x6A
struct mod_exp_params { struct mod_exp_params {
char *pExponent; // Exponent address char *pExponent; // Exponent address
@ -300,6 +301,18 @@ uint32_t svc_crypto_sha(struct sha_generic_data *sha_op, enum sha_operation_mode
*/ */
uint32_t svc_modexp(struct mod_exp_params *mod_exp_param); uint32_t svc_modexp(struct mod_exp_params *mod_exp_param);
/*
* Copies the data from source to destination using ccp
*
* Parameters:
* Source Address - SPI ROM offset
* Destination Address - Address in Verstage memory
* Size - Total size to copy
*
* Return value: BL_OK or error code
*/
uint32_t svc_ccp_dma(uint32_t spi_rom_offset, void *dest, uint32_t size);
/* C entry point for the Bootloader Userspace Application */ /* C entry point for the Bootloader Userspace Application */
void Main(void); void Main(void);

16
src/vendorcode/amd/fsp/picasso/include/bl_uapp/bl_syscall_public.h
View File

@ -30,6 +30,7 @@
#ifndef _BL_SYSCALL_PUBLIC_H_ #ifndef _BL_SYSCALL_PUBLIC_H_
#define _BL_SYSCALL_PUBLIC_H_ #define _BL_SYSCALL_PUBLIC_H_
#include <bl_uapp/bl_errorcodes_public.h>
#include <stdint.h> #include <stdint.h>
#define SVC_EXIT 0x00 #define SVC_EXIT 0x00
@ -394,6 +395,21 @@ uint32_t svc_rsa_pkcs_verify(const struct rsapkcs_verify_params *params);
*/ */
uint32_t svc_modexp(struct mod_exp_params *mod_exp_param); uint32_t svc_modexp(struct mod_exp_params *mod_exp_param);
/*
* Copies the data from source to destination using ccp
*
* Parameters:
* Source Address - SPI ROM offset
* Destination Address - Address in Verstage memory
* Size - Total size to copy
*
* Return value: BL_OK or error code
*/
static inline uint32_t svc_ccp_dma(uint32_t spi_rom_offset, void *dest, uint32_t size)
{
return BL_ERR_UNSUPPORTED_PLATFORM;
}
/* C entry point for the Bootloader Userspace Application */ /* C entry point for the Bootloader Userspace Application */
void Main(void); void Main(void);