1adbfa3511
Traditionally the kernel has refused to setup EFI at all if there's been a mismatch in 32/64-bit mode between EFI and the kernel. On some platforms that boot natively through EFI (Chrome OS being one), we still need to get at least some of the static data such as memory configuration out of EFI. Runtime services aren't as critical, and it's a significant amount of work to implement switching between the operating modes to call between kernel and firmware for thise cases. So I'm ignoring it for now. v5: * Fixed some printk strings based on feedback * Renamed 32/64-bit specific types to not have _ prefix * Fixed bug in printout of efi runtime disablement v4: * Some of the earlier cleanup was accidentally reverted by this patch, fixed. * Reworded some messages to not have to line wrap printk strings v3: * Reorganized to a series of patches to make it easier to review, and do some of the cleanups I had left out before. v2: * Added graceful error handling for 32-bit kernel that gets passed EFI data above 4GB. * Removed some warnings that were missed in first version. Signed-off-by: Olof Johansson <olof@lixom.net> Link: http://lkml.kernel.org/r/1329081869-20779-6-git-send-email-olof@lixom.net Signed-off-by: H. Peter Anvin <hpa@zytor.com>
116 lines
4.2 KiB
C
116 lines
4.2 KiB
C
#ifndef _ASM_X86_EFI_H
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#define _ASM_X86_EFI_H
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#ifdef CONFIG_X86_32
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#define EFI_LOADER_SIGNATURE "EL32"
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extern unsigned long asmlinkage efi_call_phys(void *, ...);
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#define efi_call_phys0(f) efi_call_phys(f)
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#define efi_call_phys1(f, a1) efi_call_phys(f, a1)
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#define efi_call_phys2(f, a1, a2) efi_call_phys(f, a1, a2)
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#define efi_call_phys3(f, a1, a2, a3) efi_call_phys(f, a1, a2, a3)
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#define efi_call_phys4(f, a1, a2, a3, a4) \
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efi_call_phys(f, a1, a2, a3, a4)
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#define efi_call_phys5(f, a1, a2, a3, a4, a5) \
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efi_call_phys(f, a1, a2, a3, a4, a5)
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#define efi_call_phys6(f, a1, a2, a3, a4, a5, a6) \
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efi_call_phys(f, a1, a2, a3, a4, a5, a6)
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/*
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* Wrap all the virtual calls in a way that forces the parameters on the stack.
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*/
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#define efi_call_virt(f, args...) \
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((efi_##f##_t __attribute__((regparm(0)))*)efi.systab->runtime->f)(args)
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#define efi_call_virt0(f) efi_call_virt(f)
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#define efi_call_virt1(f, a1) efi_call_virt(f, a1)
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#define efi_call_virt2(f, a1, a2) efi_call_virt(f, a1, a2)
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#define efi_call_virt3(f, a1, a2, a3) efi_call_virt(f, a1, a2, a3)
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#define efi_call_virt4(f, a1, a2, a3, a4) \
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efi_call_virt(f, a1, a2, a3, a4)
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#define efi_call_virt5(f, a1, a2, a3, a4, a5) \
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efi_call_virt(f, a1, a2, a3, a4, a5)
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#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6) \
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efi_call_virt(f, a1, a2, a3, a4, a5, a6)
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#define efi_ioremap(addr, size, type) ioremap_cache(addr, size)
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#else /* !CONFIG_X86_32 */
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#define EFI_LOADER_SIGNATURE "EL64"
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extern u64 efi_call0(void *fp);
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extern u64 efi_call1(void *fp, u64 arg1);
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extern u64 efi_call2(void *fp, u64 arg1, u64 arg2);
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extern u64 efi_call3(void *fp, u64 arg1, u64 arg2, u64 arg3);
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extern u64 efi_call4(void *fp, u64 arg1, u64 arg2, u64 arg3, u64 arg4);
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extern u64 efi_call5(void *fp, u64 arg1, u64 arg2, u64 arg3,
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u64 arg4, u64 arg5);
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extern u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3,
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u64 arg4, u64 arg5, u64 arg6);
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#define efi_call_phys0(f) \
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efi_call0((void *)(f))
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#define efi_call_phys1(f, a1) \
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efi_call1((void *)(f), (u64)(a1))
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#define efi_call_phys2(f, a1, a2) \
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efi_call2((void *)(f), (u64)(a1), (u64)(a2))
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#define efi_call_phys3(f, a1, a2, a3) \
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efi_call3((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3))
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#define efi_call_phys4(f, a1, a2, a3, a4) \
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efi_call4((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3), \
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(u64)(a4))
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#define efi_call_phys5(f, a1, a2, a3, a4, a5) \
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efi_call5((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3), \
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(u64)(a4), (u64)(a5))
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#define efi_call_phys6(f, a1, a2, a3, a4, a5, a6) \
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efi_call6((void *)(f), (u64)(a1), (u64)(a2), (u64)(a3), \
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(u64)(a4), (u64)(a5), (u64)(a6))
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#define efi_call_virt0(f) \
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efi_call0((void *)(efi.systab->runtime->f))
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#define efi_call_virt1(f, a1) \
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efi_call1((void *)(efi.systab->runtime->f), (u64)(a1))
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#define efi_call_virt2(f, a1, a2) \
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efi_call2((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2))
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#define efi_call_virt3(f, a1, a2, a3) \
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efi_call3((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
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(u64)(a3))
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#define efi_call_virt4(f, a1, a2, a3, a4) \
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efi_call4((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
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(u64)(a3), (u64)(a4))
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#define efi_call_virt5(f, a1, a2, a3, a4, a5) \
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efi_call5((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
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(u64)(a3), (u64)(a4), (u64)(a5))
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#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6) \
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efi_call6((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
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(u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))
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extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
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u32 type);
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#endif /* CONFIG_X86_32 */
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extern int add_efi_memmap;
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extern void efi_set_executable(efi_memory_desc_t *md, bool executable);
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extern int efi_memblock_x86_reserve_range(void);
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extern void efi_call_phys_prelog(void);
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extern void efi_call_phys_epilog(void);
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#ifndef CONFIG_EFI
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/*
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* IF EFI is not configured, have the EFI calls return -ENOSYS.
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*/
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#define efi_call0(_f) (-ENOSYS)
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#define efi_call1(_f, _a1) (-ENOSYS)
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#define efi_call2(_f, _a1, _a2) (-ENOSYS)
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#define efi_call3(_f, _a1, _a2, _a3) (-ENOSYS)
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#define efi_call4(_f, _a1, _a2, _a3, _a4) (-ENOSYS)
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#define efi_call5(_f, _a1, _a2, _a3, _a4, _a5) (-ENOSYS)
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#define efi_call6(_f, _a1, _a2, _a3, _a4, _a5, _a6) (-ENOSYS)
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#endif /* CONFIG_EFI */
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#endif /* _ASM_X86_EFI_H */
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