表1.标准SBI错误 不支持的SBI扩展ID(EID)或SBI函数ID(FID)的ECALL必须返回错误代码SBI_ERR_NOT_SUPPORTED。 每个SBI函数应该优先选择无符号长整型unsigned long作为数据类型。这使得规范简单且易于适应所有RISC-V ISA类型。如果数据被定义为32位宽度,则更高权限的软件必须确保只使用32位数据。 3.1. HART 列表参数 ...
SBI 实现在监管者访问内存时发生的页面和访问故障会被重定向回监管者,并且 sepc 寄存器指向故障的 ECALL指令。 传统SBI 扩展已被以下扩展所取代。传统的控制台 SBI 函数(sbi_console_getchar() 和 sbi_console_putchar())预计将被弃用;它们没有替代方案。 5.1.扩展: 设置时钟 (EID #0x00) long sbi_set_ti...
RISC-V SBI:构建高效固件通信的桥梁 ### 摘要 本文探讨了RISC-V Supervisor Binary Interface (SBI) 的重要性及其作为推荐标准接口的角色,它促进了在机器模式(M模式)下运行的固件与在超级用户模式(S模式)或高安全模式(HS模式)下执行的操作系统之间的通信。尤其强调了HS模式下的管理程序如何利用SBI实现与平台固件的...
int arch_early_init_r(void) { return riscv_cpu_probe(); int ret; ret = riscv_cpu_probe(); if (ret) return ret; if (IS_ENABLED(CONFIG_SYSRESET_SBI)) device_bind_driver(gd->dm_root, "sbi-sysreset", "sbi-sysreset", NULL); return 0; } /** 1 change: 1 addition & 0 deletio...
__asm__ volatile("ecall" \ : "+r"(a0) \ : "r"(a1), "r"(a2), "r"(a7) \ : "memory"); \ a0; \ }) void sbi_putchar(char c); void sbi_set_timer(uint64_t stime_value); uintptr_t sbi_stop_enclave(uint64_t request); void sbi_exit_enclave(uint64_t retval); ui...
An ECALL with an unsupported SBI extension ID (EID) or an unsupported SBI function ID (FID) must return the error code SBI_ERR_NOT_SUPPORTED. Every SBI function should prefer unsigned long as the data type. It keeps the specification simple and easily adaptable for all RISC-V ...
An ECALL with an unsupported SBI extension ID (EID) or an unsupported SBI function ID (FID) must return the error code SBI_ERR_NOT_SUPPORTED. Every SBI function should prefer unsigned long as the data type. It keeps the specification simple and easily adaptable for all RISC-V I...
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