diff options
| author | Alif Zakuan Yuslaimi <alif.zakuan.yuslaimi@intel.com> | 2025-02-18 16:35:03 +0800 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2025-02-25 10:54:00 -0600 |
| commit | 034ebe3302200c033078455c5774ed739cd4f2ac (patch) | |
| tree | b0d34788eccb7b693097ff5c4f25d04d42708b4a /arch/arm/mach-socfpga/smc_api.c | |
| parent | 19f20cfc49e385dd5ae5583ae68bd31f20de622c (diff) | |
arm: socfpga: smc: Add memory coherency support to mailbox command
As cache is enabled in U-Boot and disabled in ATF(BL31). We need to
perform cache flush of buffers that are shared between U-Boot and
ATF using secure monitor calls.
Signed-off-by: Mahesh Rao <mahesh.rao@altera.com>
Signed-off-by: Tien Fong Chee <tien.fong.chee@altera.com>
Signed-off-by: Alif Zakuan Yuslaimi <alif.zakuan.yuslaimi@altera.com>
Reviewed-by: Tien Fong Chee <tien.fong.chee@altera.com>
Diffstat (limited to 'arch/arm/mach-socfpga/smc_api.c')
| -rw-r--r-- | arch/arm/mach-socfpga/smc_api.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/arm/mach-socfpga/smc_api.c b/arch/arm/mach-socfpga/smc_api.c index ebaa0b8fa17..b212a94b321 100644 --- a/arch/arm/mach-socfpga/smc_api.c +++ b/arch/arm/mach-socfpga/smc_api.c @@ -1,9 +1,11 @@ // SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2020 Intel Corporation <www.intel.com> + * Copyright (C) 2025 Altera Corporation <www.altera.com> * */ +#include <cpu_func.h> #include <asm/ptrace.h> #include <asm/system.h> #include <linux/errno.h> @@ -40,10 +42,16 @@ int smc_send_mailbox(u32 cmd, u32 len, u32 *arg, u8 urgent, u32 *resp_buf_len, args[2] = len; args[3] = urgent; args[4] = (u64)resp_buf; - if (resp_buf_len) + + if (arg && len > 0) + flush_dcache_range((uintptr_t)arg, (uintptr_t)arg + len); + + if (resp_buf && resp_buf_len && *resp_buf_len > 0) { args[5] = *resp_buf_len; - else + flush_dcache_range((uintptr_t)resp_buf, (uintptr_t)resp_buf + *resp_buf_len); + } else { args[5] = 0; + } ret = invoke_smc(INTEL_SIP_SMC_MBOX_SEND_CMD, args, ARRAY_SIZE(args), resp, ARRAY_SIZE(resp)); |