diff options
| author |   Yang Zhang <yang.z.zhang@intel.com> | 2015-08-28 09:58:54 +0800 |
|---|---|---|
| committer | Yang Zhang <yang.z.zhang@intel.com> | 2015-09-01 12:44:00 +0800 |
| commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
| tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/SLOF/rtas/rtas_entry.S | |
| parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) | |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/SLOF/rtas/rtas_entry.S')
| -rw-r--r-- | qemu/roms/SLOF/rtas/rtas_entry.S | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/qemu/roms/SLOF/rtas/rtas_entry.S b/qemu/roms/SLOF/rtas/rtas_entry.S new file mode 100644 index 000000000..74693aa48 --- /dev/null +++ b/qemu/roms/SLOF/rtas/rtas_entry.S @@ -0,0 +1,72 @@ +/****************************************************************************** + * Copyright (c) 2004, 2008 IBM Corporation + * All rights reserved. + * This program and the accompanying materials + * are made available under the terms of the BSD License + * which accompanies this distribution, and is available at + * http://www.opensource.org/licenses/bsd-license.php + * + * Contributors: + * IBM Corporation - initial implementation + *****************************************************************************/ + +#include <rtas.h> + + +/* +Function: + Input: + r3: rtas parm structure + r4: base address + Output: + +Decription: Main entry point, called from OS. Second parameter is not + used. + +*/ + .globl rtas_entry +rtas_entry: + mfmsr r11 # Get MSR to enable 64-bit mode + mr r7,r11 + rotldi r11,r11,1 + ori r11,r11,1 # Always enable 64-bit mode flag + rotldi r11,r11,63 + mtmsrd r11 # Switch to 64-bit mode + isync + + mr r9,r1 # save old stack pointer + mflr r10 # save link register + bcl 20,31,.over # branch to over +.base: + .align 3 +..got: .quad _got-.base+0x8000 +..stack: .quad .stack+RTAS_STACKSIZE-0x60-.base +.over: + mflr r8 # gpr 8 is the base + ld r1,..stack-.base(r8) # load new stack pointer + add r1,r1,r8 # add base + std r2,64(r1) # save toc + ld r2,..got-.base(r8) # load got pointer + std r7,72(r1) # save original msr + std r10,80(r1) # save link register + std r9,0(r1) # save stack pointer + add r2,r2,r8 # add base + + bl save_regs_r3_r12 + bl .rtas_call + bl restore_regs_r3_r12 + +rtas_return: + ld r11,72(r1) # restore msr value + ld r0,80(r1) # restore link register value + ld r2,64(r1) # restore toc + ld r1,0(r1) # get old stack + mtmsrd r11 # restore msr (32 bit ?) + isync + mtlr r0 + blr + + + + .globl .stack + .lcomm .stack,RTAS_STACKSIZE |