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// SPDX-License-Identifier: GPL-2.0
#define pr_fmt(fmt) "optee: " fmt
#include <tee/optee.h>
#include <linux/printk.h>
#include <linux/errno.h>
static u64 optee_membase = U64_MAX;
int optee_verify_header(const struct optee_header *hdr)
{
if (IS_ERR_OR_NULL(hdr))
return -EINVAL;
if (hdr->magic != OPTEE_MAGIC) {
pr_debug("Invalid header magic 0x%08x, expected 0x%08x\n",
hdr->magic, OPTEE_MAGIC);
return -EINVAL;
}
if (hdr->version != OPTEE_VERSION_V1) {
pr_err("Only V1 headers are supported right now\n");
return -EINVAL;
}
if (IS_ENABLED(CPU_V7) &&
(hdr->arch != OPTEE_ARCH_ARM32 || hdr->init_load_addr_hi)) {
pr_err("Wrong OP-TEE Arch for ARM v7 CPU\n");
return -EINVAL;
}
if (IS_ENABLED(CPU_V8) && hdr->arch != OPTEE_ARCH_ARM64) {
pr_err("Wrong OP-TEE Arch for ARM v8 CPU\n");
return -EINVAL;
}
return 0;
}
int optee_get_membase(u64 *membase)
{
if (optee_membase == U64_MAX)
return -EINVAL;
*membase = optee_membase;
return 0;
}
void optee_set_membase(const struct optee_header *hdr)
{
int ret;
ret = optee_verify_header(hdr);
if (ret)
return;
optee_membase = (u64)hdr->init_load_addr_hi << 32;
optee_membase |= hdr->init_load_addr_lo;
}
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