cmd/smccc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2018
   4  * Michalis Pappas <mpappas@fastmail.fm>
   5  */
   6 #include <asm/psci.h>
   7 #include <command.h>
   8 #include <vsprintf.h>
   9 #include <linux/arm-smccc.h>
  10 #include <linux/compiler.h>
  11 #include <linux/psci.h>
  12
  13 static int do_call(struct cmd_tbl *cmdtp, int flag, int argc,
  14                    char *const argv[])
  15 {
  16         struct arm_smccc_res res;
  17
  18         unsigned long fid;
  19
  20         unsigned long a1;
  21         unsigned long a2;
  22         unsigned long a3;
  23         unsigned long a4;
  24         unsigned long a5;
  25         unsigned long a6;
  26         unsigned long a7;
  27
  28         if (argc < 2)
  29                 return CMD_RET_USAGE;
  30
  31         fid = hextoul(argv[1], NULL);
  32
  33         a1 = argc > 2 ? hextoul(argv[2], NULL) : 0;
  34         a2 = argc > 3 ? hextoul(argv[3], NULL) : 0;
  35         a3 = argc > 4 ? hextoul(argv[4], NULL) : 0;
  36         a4 = argc > 5 ? hextoul(argv[5], NULL) : 0;
  37         a5 = argc > 6 ? hextoul(argv[6], NULL) : 0;
  38         a6 = argc > 7 ? hextoul(argv[7], NULL) : 0;
  39         a7 = argc > 8 ? hextoul(argv[8], NULL) : 0;
  40
  41         if (!strcmp(argv[0], "smc"))
  42                 arm_smccc_smc(fid, a1, a2, a3, a4, a5, a6, a7, &res);
  43         else
  44                 arm_smccc_hvc(fid, a1, a2, a3, a4, a5, a6, a7, &res);
  45
  46         printf("Res:  0x%lx 0x%lx 0x%lx 0x%lx\n", res.a0, res.a1, res.a2, res.a3);
  47
  48         return 0;
  49 }
  50
  51 #ifdef CONFIG_CMD_SMC
  52 U_BOOT_CMD(
  53         smc,    9,              2,      do_call,
  54         "Issue a Secure Monitor Call",
  55         "<fid> [arg1 ... arg6] [id]\n"
  56         "  - fid Function ID\n"
  57         "  - arg SMC arguments, passed to X1-X6 (default to zero)\n"
  58         "  - id  Secure OS ID / Session ID, passed to W7 (defaults to zero)\n"
  59 );
  60 #endif
  61
  62 #ifdef CONFIG_CMD_HVC
  63 U_BOOT_CMD(
  64         hvc,    9,              2,      do_call,
  65         "Issue a Hypervisor Call",
  66         "<fid> [arg1...arg6] [id]\n"
  67         "  - fid Function ID\n"
  68         "  - arg HVC arguments, passed to X1-X6 (default to zero)\n"
  69         "  - id  Session ID, passed to W7 (defaults to zero)\n"
  70 );
  71 #endif