| Message ID | 20230712043436.100548-11-hchauhan@ventanamicro.com |
|---|---|
| State | Accepted |
| Headers | show
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From: Himanshu Chauhan <hchauhan@ventanamicro.com>
To: opensbi@lists.infradead.org
Cc: Himanshu Chauhan <hchauhan@ventanamicro.com>,
Anup Patel <anup@brainfault.org>
Subject: [PATCH v3 10/10] lib: sbi: Map/Unmap debug console shared memory
buffers
Date: Wed, 12 Jul 2023 10:04:36 +0530
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Content preview: With Smepmp enabled, it is necessary for shared memory from
S/U mode to be mapped/unmapped before and after read/write of the memory
region. This patch maps the debug console shared memory before acce [...]
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|
| Series |
Add support for Smepmp
|
expand
|
diff --git a/lib/sbi/sbi_ecall_dbcn.c b/lib/sbi/sbi_ecall_dbcn.c index 8e68729..18cd6c8 100644 --- a/lib/sbi/sbi_ecall_dbcn.c +++ b/lib/sbi/sbi_ecall_dbcn.c @@ -14,6 +14,7 @@ #include <sbi/sbi_ecall_interface.h> #include <sbi/sbi_trap.h> #include <sbi/riscv_asm.h> +#include <sbi/sbi_hart.h> static int sbi_ecall_dbcn_handler(unsigned long extid, unsigned long funcid, const struct sbi_trap_regs *regs, @@ -46,10 +47,12 @@ static int sbi_ecall_dbcn_handler(unsigned long extid, unsigned long funcid, regs->a1, regs->a0, smode, SBI_DOMAIN_READ|SBI_DOMAIN_WRITE)) return SBI_ERR_INVALID_PARAM; + sbi_hart_map_saddr(regs->a1, regs->a0); if (funcid == SBI_EXT_DBCN_CONSOLE_WRITE) *out_val = sbi_nputs((const char *)regs->a1, regs->a0); else *out_val = sbi_ngets((char *)regs->a1, regs->a0); + sbi_hart_unmap_saddr(); return 0; case SBI_EXT_DBCN_CONSOLE_WRITE_BYTE: sbi_putc(regs->a0);