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2011-07-18 Till Straumann <strauman@slac.stanford.edu>

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* shared/bootloader/qemu_fakerom.S: Added work-around for
	qemu bug 811683.
This commit is contained in:
Till Straumann
2011-07-18 16:38:54 +00:00
parent 96d81ef516
commit 6464a2bd2f
2 changed files with 21 additions and 0 deletions
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5
c/src/lib/libbsp/powerpc/ChangeLog
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@@ -1,3 +1,8 @@
2011-07-18 Till Straumann <strauman@slac.stanford.edu>
* shared/bootloader/qemu_fakerom.S: Added work-around for
qemu bug 811683.
2011-07-18 Till Straumann <strauman@slac.stanford.edu> 2011-07-18 Till Straumann <strauman@slac.stanford.edu>
* shared/bootloader/head.S: disable USE_PPCBUG under qemu. * shared/bootloader/head.S: disable USE_PPCBUG under qemu.

16
c/src/lib/libbsp/powerpc/shared/bootloader/qemu_fakerom.S
View File

@@ -18,6 +18,8 @@
#define PCI_MAX_DEV 32 #define PCI_MAX_DEV 32
#define BA_OPCODE(tgt) ((18<<(31-5)) | 2 | ((tgt) & 0x03fffffc))
.global fake_data .global fake_data
.global res_set_memsz .global res_set_memsz
@@ -25,6 +27,20 @@
_start: _start:
lis 1, INIT_STACK@h lis 1, INIT_STACK@h
ori 1,1,INIT_STACK@l ori 1,1,INIT_STACK@l
/* qemu 0.14.1 has the wrong exception prefix for 74xx CPUs
* (bug 811683). Work around this by putting a stub at 0x00000X00
* which simply jumps to high memory. We only need the SC exception
* for now.
*/
lis 3, BA_OPCODE(0xfff00000)@h
ori 3, 3, BA_OPCODE(0xfff00000)@l
li 4, 0x0c00
add 3, 3, 4
stw 3, 0(4)
dcbf 0, 4
icbi 0, 4
bl pci_irq_set bl pci_irq_set
/* copy residual to RAM and fix up; /* copy residual to RAM and fix up;
* this routine returns a pointer to * this routine returns a pointer to