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u-boot/arch/arm/cpu/armv8/fsl-layerscape/ppa.c
Bin Meng 723b43daec blk: Remove various places that do flush cache after read 
All these places seem to inherit the codes from the MMC driver where
a FIXME was put in the comment. However the correct operation after
read should be cache invalidate, not flush.

The underlying drivers should be responsible for the cache operation.
Remove these codes completely.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: York Sun <york.sun@nxp.com>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: York Sun <york.sun@nxp.com>
2017-09-15 08:05:10 -04:00

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/*
* Copyright 2016 NXP Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <malloc.h>
#include <config.h>
#include <errno.h>
#include <asm/system.h>
#include <asm/types.h>
#include <asm/arch/soc.h>
#ifdef CONFIG_FSL_LSCH3
#include <asm/arch/immap_lsch3.h>
#elif defined(CONFIG_FSL_LSCH2)
#include <asm/arch/immap_lsch2.h>
#endif
#ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
#include <asm/armv8/sec_firmware.h>
#endif
#ifdef CONFIG_CHAIN_OF_TRUST
#include <fsl_validate.h>
#endif
#ifdef CONFIG_SYS_LS_PPA_FW_IN_NAND
#include <nand.h>
#elif defined(CONFIG_SYS_LS_PPA_FW_IN_MMC)
#include <mmc.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
int ppa_init(void)
{
unsigned int el = current_el();
void *ppa_fit_addr;
u32 *boot_loc_ptr_l, *boot_loc_ptr_h;
int ret;
#ifdef CONFIG_CHAIN_OF_TRUST
uintptr_t ppa_esbc_hdr = 0;
uintptr_t ppa_img_addr = 0;
#if defined(CONFIG_SYS_LS_PPA_FW_IN_MMC) || \
defined(CONFIG_SYS_LS_PPA_FW_IN_NAND)
void *ppa_hdr_ddr;
#endif
#endif
/* Skip if running at lower exception level */
if (el < 3) {
debug("Skipping PPA init, running at EL%d\n", el);
return 0;
}
#ifdef CONFIG_SYS_LS_PPA_FW_IN_XIP
ppa_fit_addr = (void *)CONFIG_SYS_LS_PPA_FW_ADDR;
debug("%s: PPA image load from XIP\n", __func__);
#ifdef CONFIG_CHAIN_OF_TRUST
ppa_esbc_hdr = CONFIG_SYS_LS_PPA_ESBC_ADDR;
#endif
#else /* !CONFIG_SYS_LS_PPA_FW_IN_XIP */
size_t fw_length, fdt_header_len = sizeof(struct fdt_header);
/* Copy PPA image from MMC/SD/NAND to allocated memory */
#ifdef CONFIG_SYS_LS_PPA_FW_IN_MMC
struct mmc *mmc;
int dev = CONFIG_SYS_MMC_ENV_DEV;
struct fdt_header *fitp;
u32 cnt;
u32 blk;
debug("%s: PPA image load from eMMC/SD\n", __func__);
ret = mmc_initialize(gd->bd);
if (ret) {
printf("%s: mmc_initialize() failed\n", __func__);
return ret;
}
mmc = find_mmc_device(dev);
if (!mmc) {
printf("PPA: MMC cannot find device for PPA firmware\n");
return -ENODEV;
}
ret = mmc_init(mmc);
if (ret) {
printf("%s: mmc_init() failed\n", __func__);
return ret;
}
fitp = malloc(roundup(fdt_header_len, 512));
if (!fitp) {
printf("PPA: malloc failed for FIT header(size 0x%zx)\n",
roundup(fdt_header_len, 512));
return -ENOMEM;
}
blk = CONFIG_SYS_LS_PPA_FW_ADDR / 512;
cnt = DIV_ROUND_UP(fdt_header_len, 512);
debug("%s: MMC read PPA FIT header: dev # %u, block # %u, count %u\n",
__func__, dev, blk, cnt);
ret = mmc->block_dev.block_read(&mmc->block_dev, blk, cnt, fitp);
if (ret != cnt) {
free(fitp);
printf("MMC/SD read of PPA FIT header at offset 0x%x failed\n",
CONFIG_SYS_LS_PPA_FW_ADDR);
return -EIO;
}
ret = fdt_check_header(fitp);
if (ret) {
free(fitp);
printf("%s: fdt_check_header() failed\n", __func__);
return ret;
}
#ifdef CONFIG_CHAIN_OF_TRUST
ppa_hdr_ddr = malloc(CONFIG_LS_PPA_ESBC_HDR_SIZE);
if (!ppa_hdr_ddr) {
printf("PPA: malloc failed for PPA header\n");
return -ENOMEM;
}
blk = CONFIG_SYS_LS_PPA_ESBC_ADDR >> 9;
cnt = DIV_ROUND_UP(CONFIG_LS_PPA_ESBC_HDR_SIZE, 512);
ret = mmc->block_dev.block_read(&mmc->block_dev, blk, cnt, ppa_hdr_ddr);
if (ret != cnt) {
free(ppa_hdr_ddr);
printf("MMC/SD read of PPA header failed\n");
return -EIO;
}
debug("Read PPA header to 0x%p\n", ppa_hdr_ddr);
ppa_esbc_hdr = (uintptr_t)ppa_hdr_ddr;
#endif
fw_length = fdt_totalsize(fitp);
free(fitp);
fw_length = roundup(fw_length, 512);
ppa_fit_addr = malloc(fw_length);
if (!ppa_fit_addr) {
printf("PPA: malloc failed for PPA image(size 0x%zx)\n",
fw_length);
return -ENOMEM;
}
blk = CONFIG_SYS_LS_PPA_FW_ADDR / 512;
cnt = DIV_ROUND_UP(fw_length, 512);
debug("%s: MMC read PPA FIT image: dev # %u, block # %u, count %u\n",
__func__, dev, blk, cnt);
ret = mmc->block_dev.block_read(&mmc->block_dev,
blk, cnt, ppa_fit_addr);
if (ret != cnt) {
free(ppa_fit_addr);
printf("MMC/SD read of PPA FIT header at offset 0x%x failed\n",
CONFIG_SYS_LS_PPA_FW_ADDR);
return -EIO;
}
#elif defined(CONFIG_SYS_LS_PPA_FW_IN_NAND)
struct fdt_header fit;
debug("%s: PPA image load from NAND\n", __func__);
nand_init();
ret = nand_read(get_nand_dev_by_index(0),
(loff_t)CONFIG_SYS_LS_PPA_FW_ADDR,
&fdt_header_len, (u_char *)&fit);
if (ret == -EUCLEAN) {
printf("NAND read of PPA FIT header at offset 0x%x failed\n",
CONFIG_SYS_LS_PPA_FW_ADDR);
return -EIO;
}
ret = fdt_check_header(&fit);
if (ret) {
printf("%s: fdt_check_header() failed\n", __func__);
return ret;
}
#ifdef CONFIG_CHAIN_OF_TRUST
ppa_hdr_ddr = malloc(CONFIG_LS_PPA_ESBC_HDR_SIZE);
if (!ppa_hdr_ddr) {
printf("PPA: malloc failed for PPA header\n");
return -ENOMEM;
}
fw_length = CONFIG_LS_PPA_ESBC_HDR_SIZE;
ret = nand_read(get_nand_dev_by_index(0),
(loff_t)CONFIG_SYS_LS_PPA_ESBC_ADDR,
&fw_length, (u_char *)ppa_hdr_ddr);
if (ret == -EUCLEAN) {
free(ppa_hdr_ddr);
printf("NAND read of PPA firmware at offset 0x%x failed\n",
CONFIG_SYS_LS_PPA_FW_ADDR);
return -EIO;
}
debug("Read PPA header to 0x%p\n", ppa_hdr_ddr);
ppa_esbc_hdr = (uintptr_t)ppa_hdr_ddr;
#endif
fw_length = fdt_totalsize(&fit);
ppa_fit_addr = malloc(fw_length);
if (!ppa_fit_addr) {
printf("PPA: malloc failed for PPA image(size 0x%zx)\n",
fw_length);
return -ENOMEM;
}
ret = nand_read(get_nand_dev_by_index(0),
(loff_t)CONFIG_SYS_LS_PPA_FW_ADDR,
&fw_length, (u_char *)ppa_fit_addr);
if (ret == -EUCLEAN) {
free(ppa_fit_addr);
printf("NAND read of PPA firmware at offset 0x%x failed\n",
CONFIG_SYS_LS_PPA_FW_ADDR);
return -EIO;
}
#else
#error "No CONFIG_SYS_LS_PPA_FW_IN_xxx defined"
#endif
#endif
#ifdef CONFIG_CHAIN_OF_TRUST
ppa_img_addr = (uintptr_t)ppa_fit_addr;
if (fsl_check_boot_mode_secure() != 0) {
/*
* In case of failure in validation, fsl_secboot_validate
* would not return back in case of Production environment
* with ITS=1. In Development environment (ITS=0 and
* SB_EN=1), the function may return back in case of
* non-fatal failures.
*/
ret = fsl_secboot_validate(ppa_esbc_hdr,
PPA_KEY_HASH,
&ppa_img_addr);
if (ret != 0)
printf("PPA validation failed\n");
else
printf("PPA validation Successful\n");
}
#if defined(CONFIG_SYS_LS_PPA_FW_IN_MMC) || \
defined(CONFIG_SYS_LS_PPA_FW_IN_NAND)
free(ppa_hdr_ddr);
#endif
#endif
#ifdef CONFIG_FSL_LSCH3
struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
boot_loc_ptr_l = &gur->bootlocptrl;
boot_loc_ptr_h = &gur->bootlocptrh;
#elif defined(CONFIG_FSL_LSCH2)
struct ccsr_scfg __iomem *scfg = (void *)(CONFIG_SYS_FSL_SCFG_ADDR);
boot_loc_ptr_l = &scfg->scratchrw[1];
boot_loc_ptr_h = &scfg->scratchrw[0];
#endif
debug("fsl-ppa: boot_loc_ptr_l = 0x%p, boot_loc_ptr_h =0x%p\n",
boot_loc_ptr_l, boot_loc_ptr_h);
ret = sec_firmware_init(ppa_fit_addr, boot_loc_ptr_l, boot_loc_ptr_h);
#if defined(CONFIG_SYS_LS_PPA_FW_IN_MMC) || \
defined(CONFIG_SYS_LS_PPA_FW_IN_NAND)
free(ppa_fit_addr);
#endif
return ret;
}
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