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// SPDX-License-Identifier: GPL-2.0-only
#include <asm/barebox-arm.h>
#include <init.h>
#include <linux/err.h>
#include <linux/printk.h>
#include <mach/imx/imx8m-regs.h>
#include <mach/imx/imx9-regs.h>
#include <mach/imx/esdctl.h>
#include <mach/imx/scratch.h>
#include <memory.h>
#include <tee/optee.h>
#include <pbl.h>
struct imx_scratch_space {
u32 bootrom_log[128];
u32 reserved[128]; /* reserve for bootrom log */
struct optee_header optee_hdr;
};
static struct imx_scratch_space *scratch;
void imx8m_init_scratch_space(int ddr_buswidth, bool zero_init)
{
ulong endmem = MX8M_DDR_CSD1_BASE_ADDR +
imx8m_barebox_earlymem_size(ddr_buswidth);
scratch = (void *)arm_mem_scratch(endmem);
if (zero_init)
memset(scratch, 0, sizeof(*scratch));
}
void imx93_init_scratch_space(bool zero_init)
{
ulong endmem = MX9_DDR_CSD1_BASE_ADDR + imx9_ddrc_sdram_size();
scratch = (void *)arm_mem_scratch(endmem);
if (zero_init)
memset(scratch, 0, sizeof(*scratch));
}
void imx8m_scratch_save_bootrom_log(const u32 *rom_log)
{
size_t sz = sizeof(scratch->bootrom_log);
if (!scratch) {
pr_err("No scratch area initialized, skip saving bootrom log");
return;
}
pr_debug("Saving bootrom log to scratch area 0x%p\n", &scratch->bootrom_log);
memcpy(scratch->bootrom_log, rom_log, sz);
}
const u32 *imx8m_scratch_get_bootrom_log(void)
{
if (!scratch) {
if (IN_PBL)
return ERR_PTR(-EINVAL);
else
scratch = (void *)arm_mem_scratch_get();
}
return scratch->bootrom_log;
}
void imx_scratch_save_optee_hdr(const struct optee_header *hdr)
{
size_t sz = sizeof(*hdr);
if (!scratch) {
pr_err("No scratch area initialized, skip saving optee-hdr");
return;
}
pr_debug("Saving optee-hdr to scratch area 0x%p\n", &scratch->optee_hdr);
memcpy(&scratch->optee_hdr, hdr, sz);
}
const struct optee_header *imx_scratch_get_optee_hdr(void)
{
if (!scratch) {
if (IN_PBL)
return ERR_PTR(-EINVAL);
else
scratch = (void *)arm_mem_scratch_get();
}
return &scratch->optee_hdr;
}
static int imx8m_reserve_scratch_area(void)
{
return PTR_ERR_OR_ZERO(request_sdram_region("scratch area",
(ulong)arm_mem_scratch_get(),
sizeof(struct imx_scratch_space)));
}
device_initcall(imx8m_reserve_scratch_area);
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