From ddf3b649f1edd9eb5ad171c7faadf34acfb942f0 Mon Sep 17 00:00:00 2001 From: Bo Gan Date: Tue, 5 Mar 2024 18:35:39 -0800 Subject: [PATCH] include: sbi: add emulate_load/store handler to platform ops This patch allows the platform to define load/store emulators. This enables a platform to trap-and-emulate special devices or filter access to existing physical devices. Signed-off-by: Bo Gan Reviewed-by: Anup Patel --- include/sbi/sbi_platform.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/sbi/sbi_platform.h b/include/sbi/sbi_platform.h index 2fb33e16..f962aa46 100644 --- a/include/sbi/sbi_platform.h +++ b/include/sbi/sbi_platform.h @@ -53,6 +53,7 @@ struct sbi_domain_memregion; struct sbi_ecall_return; struct sbi_trap_regs; struct sbi_hart_features; +union sbi_ldst_data; /** Possible feature flags of a platform */ enum sbi_platform_features { @@ -139,6 +140,13 @@ struct sbi_platform_operations { int (*vendor_ext_provider)(long funcid, struct sbi_trap_regs *regs, struct sbi_ecall_return *out); + + /** platform specific handler to fixup load fault */ + int (*emulate_load)(int rlen, unsigned long addr, + union sbi_ldst_data *out_val); + /** platform specific handler to fixup store fault */ + int (*emulate_store)(int wlen, unsigned long addr, + union sbi_ldst_data in_val); }; /** Platform default per-HART stack size for exception/interrupt handling */