From 197b0ecd37e8c41015586ee9711c807b9b625b0b Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Thu, 3 Jul 2025 00:29:19 -0400 Subject: kernel/aarch64: Add 'board_info' structure Introduce a 'board_info' structure as well as an md_get_board() routine to get information about the host Signed-off-by: Ian Moffett --- sys/arch/aarch64/aarch64/machdep.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'sys/arch/aarch64') diff --git a/sys/arch/aarch64/aarch64/machdep.c b/sys/arch/aarch64/aarch64/machdep.c index 33d7c42..9a96cbb 100644 --- a/sys/arch/aarch64/aarch64/machdep.c +++ b/sys/arch/aarch64/aarch64/machdep.c @@ -31,6 +31,7 @@ #include #include #include +#include struct cpu_info g_bsp_ci = {0}; @@ -98,3 +99,13 @@ cpu_startup(struct cpu_info *ci) __ASMV("msr tpidr_el1, %0" :: "r" (ci)); md_cpu_init(); } + +void +md_get_board(struct board_info *res) +{ + uint64_t midr_el1; + + __ASMV("mrs %0, midr_el1" : "=r" (midr_el1)); + res->partno = (midr_el1 >> 4) & 0xFFF; + res->implementer = (midr_el1 >> 24) & 0xFF; +} -- cgit v1.2.3