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-rw-r--r--arch/ia64/kernel/efi_stub.S87
1 files changed, 0 insertions, 87 deletions
diff --git a/arch/ia64/kernel/efi_stub.S b/arch/ia64/kernel/efi_stub.S
deleted file mode 100644
index 1fd61b78fb29..000000000000
--- a/arch/ia64/kernel/efi_stub.S
+++ /dev/null
@@ -1,87 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * EFI call stub.
- *
- * Copyright (C) 1999-2001 Hewlett-Packard Co
- * David Mosberger <davidm@hpl.hp.com>
- *
- * This stub allows us to make EFI calls in physical mode with interrupts
- * turned off. We need this because we can't call SetVirtualMap() until
- * the kernel has booted far enough to allow allocation of struct vm_area_struct
- * entries (which we would need to map stuff with memory attributes other
- * than uncached or writeback...). Since the GetTime() service gets called
- * earlier than that, we need to be able to make physical mode EFI calls from
- * the kernel.
- */
-
-/*
- * PSR settings as per SAL spec (Chapter 8 in the "IA-64 System
- * Abstraction Layer Specification", revision 2.6e). Note that
- * psr.dfl and psr.dfh MUST be cleared, despite what this manual says.
- * Otherwise, SAL dies whenever it's trying to do an IA-32 BIOS call
- * (the br.ia instruction fails unless psr.dfl and psr.dfh are
- * cleared). Fortunately, SAL promises not to touch the floating
- * point regs, so at least we don't have to save f2-f127.
- */
-#define PSR_BITS_TO_CLEAR \
- (IA64_PSR_I | IA64_PSR_IT | IA64_PSR_DT | IA64_PSR_RT | \
- IA64_PSR_DD | IA64_PSR_SS | IA64_PSR_RI | IA64_PSR_ED | \
- IA64_PSR_DFL | IA64_PSR_DFH)
-
-#define PSR_BITS_TO_SET \
- (IA64_PSR_BN)
-
-#include <asm/processor.h>
-#include <asm/asmmacro.h>
-
-/*
- * Inputs:
- * in0 = address of function descriptor of EFI routine to call
- * in1..in7 = arguments to routine
- *
- * Outputs:
- * r8 = EFI_STATUS returned by called function
- */
-
-GLOBAL_ENTRY(efi_call_phys)
- .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
- alloc loc1=ar.pfs,8,7,7,0
- ld8 r2=[in0],8 // load EFI function's entry point
- mov loc0=rp
- .body
- ;;
- mov loc2=gp // save global pointer
- mov loc4=ar.rsc // save RSE configuration
- mov ar.rsc=0 // put RSE in enforced lazy, LE mode
- ;;
- ld8 gp=[in0] // load EFI function's global pointer
- movl r16=PSR_BITS_TO_CLEAR
- mov loc3=psr // save processor status word
- movl r17=PSR_BITS_TO_SET
- ;;
- or loc3=loc3,r17
- mov b6=r2
- ;;
- andcm r16=loc3,r16 // get psr with IT, DT, and RT bits cleared
- br.call.sptk.many rp=ia64_switch_mode_phys
-.ret0: mov out4=in5
- mov out0=in1
- mov out1=in2
- mov out2=in3
- mov out3=in4
- mov out5=in6
- mov out6=in7
- mov loc5=r19
- mov loc6=r20
- br.call.sptk.many rp=b6 // call the EFI function
-.ret1: mov ar.rsc=0 // put RSE in enforced lazy, LE mode
- mov r16=loc3
- mov r19=loc5
- mov r20=loc6
- br.call.sptk.many rp=ia64_switch_mode_virt // return to virtual mode
-.ret2: mov ar.rsc=loc4 // restore RSE configuration
- mov ar.pfs=loc1
- mov rp=loc0
- mov gp=loc2
- br.ret.sptk.many rp
-END(efi_call_phys)