On 6/6/20 7:15 PM, Ard Biesheuvel wrote:
Add an override for enable_caches to enable the I and D caches, along with the cached 1:1 mapping of all of DRAM. This is needed for running U-Boot under virtualization with QEMU/kvm.
Signed-off-by: Ard Biesheuvel ardb@kernel.org
board/emulation/qemu-arm/qemu-arm.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/board/emulation/qemu-arm/qemu-arm.c b/board/emulation/qemu-arm/qemu-arm.c index 69e8ef46f1f5..1b0d543b93c1 100644 --- a/board/emulation/qemu-arm/qemu-arm.c +++ b/board/emulation/qemu-arm/qemu-arm.c @@ -4,6 +4,7 @@ */
#include <common.h> +#include <cpu_func.h> #include <dm.h> #include <fdtdec.h> #include <init.h> @@ -94,6 +95,12 @@ void *board_fdt_blob_setup(void) return (void *)CONFIG_SYS_SDRAM_BASE; }
+void enable_caches(void) +{
icache_enable();dcache_enable();+}
For other ARM architectures I have seen:
int arch_cpu_init(void) { icache_enable(); return 0; }
void enable_caches(void) { dcache_enable(); }
Some boards have
if (!icache_status()) icache_enable();
others
#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF) icache_enable(); #endif
Tom could you, please, advice what is the correct way to do it.
Best regards
Heinrich
#if defined(CONFIG_EFI_RNG_PROTOCOL) #include <efi_loader.h> #include <efi_rng.h>