board/xilinx/zynqmp/cmds.c

// SPDX-License-Identifier: GPL-2.0
/*
 * (C) Copyright 2018 Xilinx, Inc.
 * Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
 */

#include <common.h>
#include <malloc.h>
#include <asm/arch/sys_proto.h>
#include <asm/io.h>

static int do_zynqmp_verify_secure(cmd_tbl_t *cmdtp, int flag, int argc,
				   char * const argv[])
{
	u64 src_addr, addr;
	u32 len, src_lo, src_hi;
	u8 *key_ptr = NULL;
	int ret;
	u32 key_lo = 0;
	u32 key_hi = 0;
	u32 ret_payload[PAYLOAD_ARG_CNT];

	if (argc < 4)
		return CMD_RET_USAGE;

	src_addr = simple_strtoull(argv[2], NULL, 16);
	len = simple_strtoul(argv[3], NULL, 16);

	if (argc == 5)
		key_ptr = (uint8_t *)(uintptr_t)simple_strtoull(argv[4],
								NULL, 16);

	if ((ulong)src_addr != ALIGN((ulong)src_addr,
				     CONFIG_SYS_CACHELINE_SIZE)) {
		printf("Failed: source address not aligned:%lx\n",
		       (ulong)src_addr);
		return -EINVAL;
	}

	src_lo = lower_32_bits((ulong)src_addr);
	src_hi = upper_32_bits((ulong)src_addr);
	flush_dcache_range((ulong)src_addr, (ulong)(src_addr + len));

	if (key_ptr) {
		key_lo = lower_32_bits((ulong)key_ptr);
		key_hi = upper_32_bits((ulong)key_ptr);
		flush_dcache_range((ulong)key_ptr,
				   (ulong)(key_ptr + KEY_PTR_LEN));
	}

	ret = invoke_smc(ZYNQMP_SIP_SVC_PM_SECURE_IMG_LOAD, src_lo, src_hi,
			 key_lo, key_hi, ret_payload);
	if (ret) {
		printf("Failed: secure op status:0x%x\n", ret);
	} else {
		addr = (u64)ret_payload[1] << 32 | ret_payload[2];
		printf("Verified image at 0x%llx\n", addr);
		env_set_hex("zynqmp_verified_img_addr", addr);
	}

	return ret;
}

static int do_zynqmp_mmio_read(cmd_tbl_t *cmdtp, int flag, int argc,
			       char * const argv[])
{
	u32 read_val, addr;
	int ret;

	if (argc != cmdtp->maxargs)
		return CMD_RET_USAGE;

	addr = simple_strtoul(argv[2], NULL, 16);

	ret = zynqmp_mmio_read(addr, &read_val);
	if (!ret)
		printf("mmio read value at 0x%x = 0x%x\n",
		       addr, read_val);
	else
		printf("Failed: mmio read\n");

	return ret;
}

static int do_zynqmp_mmio_write(cmd_tbl_t *cmdtp, int flag, int argc,
				char * const argv[])
{
	u32 addr, mask, val;
	int ret;

	if (argc != cmdtp->maxargs)
		return CMD_RET_USAGE;

	addr = simple_strtoul(argv[2], NULL, 16);
	mask = simple_strtoul(argv[3], NULL, 16);
	val = simple_strtoul(argv[4], NULL, 16);

	ret = zynqmp_mmio_write(addr, mask, val);
	if (ret != 0)
		printf("Failed: mmio write\n");

	return ret;
}

static cmd_tbl_t cmd_zynqmp_sub[] = {
	U_BOOT_CMD_MKENT(secure, 5, 0, do_zynqmp_verify_secure, "", ""),
	U_BOOT_CMD_MKENT(mmio_read, 3, 0, do_zynqmp_mmio_read, "", ""),
	U_BOOT_CMD_MKENT(mmio_write, 5, 0, do_zynqmp_mmio_write, "", ""),
};

/**
 * do_zynqmp - Handle the "zynqmp" command-line command
 * @cmdtp:	Command data struct pointer
 * @flag:	Command flag
 * @argc:	Command-line argument count
 * @argv:	Array of command-line arguments
 *
 * Processes the zynqmp specific commands
 *
 * Return: return 0 on success and CMD_RET_USAGE incase of misuse and error
 */
static int do_zynqmp(cmd_tbl_t *cmdtp, int flag, int argc,
		     char *const argv[])
{
	cmd_tbl_t *c;

	if (argc < 2)
		return CMD_RET_USAGE;

	c = find_cmd_tbl(argv[1], &cmd_zynqmp_sub[0],
			 ARRAY_SIZE(cmd_zynqmp_sub));

	if (c)
		return c->cmd(c, flag, argc, argv);
	else
		return CMD_RET_USAGE;
}

/***************************************************/
#ifdef CONFIG_SYS_LONGHELP
static char zynqmp_help_text[] =
	"secure src len [key_addr] - verifies secure images of $len bytes\n"
	"                            long at address $src. Optional key_addr\n"
	"                            can be specified if user key needs to\n"
	"                            be used for decryption\n"
	"zynqmp mmio_read address - read from address\n"
	"zynqmp mmio_write address mask value - write value after masking to\n"
	"					address\n";
#endif

U_BOOT_CMD(
	zynqmp, 5, 1, do_zynqmp,
	"ZynqMP sub-system",
	zynqmp_help_text
)