Author: mhorne Date: Fri Nov 15 03:40:02 2019 New Revision: 354722 URL: https://svnweb.freebsd.org/changeset/base/354722
Log: RISC-V: Print SBI info at startup SBI version 0.2 introduces functions for obtaining the details of the SBI implementation, such as version and implemntation ID. Print this info at startup when it is available. Reviewed by: jhb, kp MFC after: 3 weeks Differential Revision: https://reviews.freebsd.org/D22327 Modified: head/sys/riscv/include/sbi.h head/sys/riscv/riscv/machdep.c head/sys/riscv/riscv/sbi.c Modified: head/sys/riscv/include/sbi.h ============================================================================== --- head/sys/riscv/include/sbi.h Fri Nov 15 03:37:49 2019 (r354721) +++ head/sys/riscv/include/sbi.h Fri Nov 15 03:40:02 2019 (r354722) @@ -201,6 +201,7 @@ sbi_remote_sfence_vma_asid(const unsigned long *hart_m start, size, asid); } +void sbi_print_version(void); void sbi_init(void); #endif /* !_MACHINE_SBI_H_ */ Modified: head/sys/riscv/riscv/machdep.c ============================================================================== --- head/sys/riscv/riscv/machdep.c Fri Nov 15 03:37:49 2019 (r354721) +++ head/sys/riscv/riscv/machdep.c Fri Nov 15 03:40:02 2019 (r354722) @@ -128,6 +128,7 @@ static void cpu_startup(void *dummy) { + sbi_print_version(); identify_cpu(); printf("real memory = %ju (%ju MB)\n", ptoa((uintmax_t)realmem), Modified: head/sys/riscv/riscv/sbi.c ============================================================================== --- head/sys/riscv/riscv/sbi.c Fri Nov 15 03:37:49 2019 (r354721) +++ head/sys/riscv/riscv/sbi.c Fri Nov 15 03:40:02 2019 (r354722) @@ -35,6 +35,10 @@ __FBSDID("$FreeBSD$"); #include <machine/md_var.h> #include <machine/sbi.h> +/* SBI Implementation-Specific Definitions */ +#define OPENSBI_VERSION_MAJOR_OFFSET 16 +#define OPENSBI_VERSION_MINOR_MASK 0xFFFF + u_long sbi_spec_version; u_long sbi_impl_id; u_long sbi_impl_version; @@ -74,6 +78,39 @@ static struct sbi_ret sbi_get_mimpid(void) { return (SBI_CALL0(SBI_EXT_ID_BASE, SBI_BASE_GET_MIMPID)); +} + +void +sbi_print_version(void) +{ + u_int major; + u_int minor; + + /* For legacy SBI implementations. */ + if (sbi_spec_version == 0) { + printf("SBI: Unknown (Legacy) Implementation\n"); + printf("SBI Specification Version: 0.1\n"); + return; + } + + switch (sbi_impl_id) { + case (SBI_IMPL_ID_BBL): + printf("SBI: Berkely Boot Loader %u\n", sbi_impl_version); + break; + case (SBI_IMPL_ID_OPENSBI): + major = sbi_impl_version >> OPENSBI_VERSION_MAJOR_OFFSET; + minor = sbi_impl_version & OPENSBI_VERSION_MINOR_MASK; + printf("SBI: OpenSBI v%u.%u\n", major, minor); + break; + default: + printf("SBI: Unrecognized Implementation: %u\n", sbi_impl_id); + break; + } + + major = (sbi_spec_version & SBI_SPEC_VERS_MAJOR_MASK) >> + SBI_SPEC_VERS_MAJOR_OFFSET; + minor = (sbi_spec_version & SBI_SPEC_VERS_MINOR_MASK); + printf("SBI Specification Version: %u.%u\n", major, minor); } void _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
