Unverified Commit b91540d5 authored by Atish Patra's avatar Atish Patra Committed by Palmer Dabbelt
Browse files

RISC-V: Add EFI runtime services 



This patch adds EFI runtime service support for RISC-V.

Signed-off-by: default avatarAtish Patra <atish.patra@wdc.com>
[ardb: - Remove the page check]
Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
Acked-by: default avatarArd Biesheuvel <ardb@kernel.org>
Signed-off-by: default avatarPalmer Dabbelt <palmerdabbelt@google.com>
parent d7071743

arch/riscv/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -412,7 +412,9 @@ config EFI 
	select EFI_PARAMS_FROM_FDT

	select EFI_STUB

	select EFI_GENERIC_STUB

	select EFI_RUNTIME_WRAPPERS

	select RISCV_ISA_C

	depends on MMU

	default y

	help

	  This option provides support for runtime services provided

arch/riscv/include/asm/efi.h

+20 −0
Original line number Diff line number Diff line
@@ -5,11 +5,28 @@ 
#ifndef _ASM_EFI_H

#define _ASM_EFI_H



#include <asm/csr.h>

#include <asm/io.h>

#include <asm/mmu_context.h>

#include <asm/ptrace.h>

#include <asm/tlbflush.h>



#ifdef CONFIG_EFI

extern void efi_init(void);

#else

#define efi_init()

#endif



int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);

int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md);



#define arch_efi_call_virt_setup()      efi_virtmap_load()

#define arch_efi_call_virt_teardown()   efi_virtmap_unload()



#define arch_efi_call_virt(p, f, args...) p->f(args)



#define ARCH_EFI_IRQ_FLAGS_MASK (SR_IE | SR_SPIE)



/* on RISC-V, the FDT may be located anywhere in system RAM */

static inline unsigned long efi_get_max_fdt_addr(unsigned long image_addr)

{
@@ -32,4 +49,7 @@ static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt) 
{

}



void efi_virtmap_load(void);

void efi_virtmap_unload(void);



#endif /* _ASM_EFI_H */

arch/riscv/include/asm/mmu.h

+2 −0
Original line number Diff line number Diff line
@@ -20,6 +20,8 @@ typedef struct { 
#endif

} mm_context_t;



void __init create_pgd_mapping(pgd_t *pgdp, uintptr_t va, phys_addr_t pa,

			       phys_addr_t sz, pgprot_t prot);

#endif /* __ASSEMBLY__ */



#endif /* _ASM_RISCV_MMU_H */

arch/riscv/include/asm/pgtable.h

+4 −0
Original line number Diff line number Diff line
@@ -100,6 +100,10 @@ 


#define PAGE_KERNEL		__pgprot(_PAGE_KERNEL)

#define PAGE_KERNEL_EXEC	__pgprot(_PAGE_KERNEL | _PAGE_EXEC)

#define PAGE_KERNEL_READ	__pgprot(_PAGE_KERNEL & ~_PAGE_WRITE)

#define PAGE_KERNEL_EXEC	__pgprot(_PAGE_KERNEL | _PAGE_EXEC)

#define PAGE_KERNEL_READ_EXEC	__pgprot((_PAGE_KERNEL & ~_PAGE_WRITE) \

					 | _PAGE_EXEC)



#define PAGE_TABLE		__pgprot(_PAGE_TABLE)

arch/riscv/kernel/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -55,4 +55,6 @@ obj-$(CONFIG_KGDB) += kgdb.o 


obj-$(CONFIG_JUMP_LABEL)	+= jump_label.o



obj-$(CONFIG_EFI)		+= efi.o



clean:

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