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| author | David S. Miller <davem@sunset.davemloft.net> | 2005-10-11 15:45:16 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2005-10-11 15:45:16 -0700 |
| commit | b1b510aa284af1908d5d369d52f7dae16aaabd71 (patch) | |
| tree | dd79875667adf73552c4b9c4789aee2b4ada8368 /arch/sparc64/kernel/head.S | |
| parent | 08eb8f124f990aa476589d1f7810f7ec7f259c08 (diff) | |
| download | lwn-b1b510aa284af1908d5d369d52f7dae16aaabd71.tar.gz lwn-b1b510aa284af1908d5d369d52f7dae16aaabd71.zip | |
[SPARC64]: Fix net booting on Ultra5
We were not doing alignment properly when remapping the kernel image.
What we want is a 4MB aligned physical address to map at KERNBASE.
Mistakedly we were 4MB aligning the virtual address where the kernel
initially sits, that's wrong.
Instead, we should PAGE align the virtual address, then 4MB align the
physical address result the prom gives to us.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64/kernel/head.S')
| -rw-r--r-- | arch/sparc64/kernel/head.S | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S index f1dcdf8f7433..4c942f71184d 100644 --- a/arch/sparc64/kernel/head.S +++ b/arch/sparc64/kernel/head.S @@ -191,8 +191,9 @@ prom_boot_mapping_phys_low: stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 5 stx %l2, [%sp + 2047 + 128 + 0x18] ! arg1: "translate" stx %l5, [%sp + 2047 + 128 + 0x20] ! arg2: prom_mmu_ihandle_cache - srlx %l0, 22, %l3 - sllx %l3, 22, %l3 + /* PAGE align */ + srlx %l0, 13, %l3 + sllx %l3, 13, %l3 stx %l3, [%sp + 2047 + 128 + 0x28] ! arg3: vaddr, our PC stx %g0, [%sp + 2047 + 128 + 0x30] ! res1 stx %g0, [%sp + 2047 + 128 + 0x38] ! res2 @@ -211,6 +212,9 @@ prom_boot_mapping_phys_low: ldx [%sp + 2047 + 128 + 0x48], %l2 ! physaddr high stx %l2, [%l4 + 0x0] ldx [%sp + 2047 + 128 + 0x50], %l3 ! physaddr low + /* 4MB align */ + srlx %l3, 22, %l3 + sllx %l3, 22, %l3 stx %l3, [%l4 + 0x8] /* Leave service as-is, "call-method" */ |