Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux...

[linux-2.6-omap-h63xx.git] / arch / sparc64 / kernel / head.S

diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S
index c4147ad8677b5307c4323ec06160b7fe541aa063..34f8ff57c56ba157ef591d7bf30329fea0be6fea 100644 (file)
--- a/arch/sparc64/kernel/head.S
+++ b/arch/sparc64/kernel/head.S
@@ -288,8 +288,12 @@ sun4v_chip_type:
        /* Leave arg2 as-is, prom_mmu_ihandle_cache */
        mov     -1, %l3
        stx     %l3, [%sp + 2047 + 128 + 0x28]  ! arg3: mode (-1 default)
-       sethi   %hi(8 * 1024 * 1024), %l3
-       stx     %l3, [%sp + 2047 + 128 + 0x30]  ! arg4: size (8MB)
+       /* 4MB align the kernel image size. */
+       set     (_end - KERNBASE), %l3
+       set     ((4 * 1024 * 1024) - 1), %l4
+       add     %l3, %l4, %l3
+       andn    %l3, %l4, %l3
+       stx     %l3, [%sp + 2047 + 128 + 0x30]  ! arg4: roundup(ksize, 4MB)
        sethi   %hi(KERNBASE), %l3
        stx     %l3, [%sp + 2047 + 128 + 0x38]  ! arg5: vaddr (KERNBASE)
        stx     %g0, [%sp + 2047 + 128 + 0x40]  ! arg6: empty
@@ -632,11 +636,36 @@ tlb_fixup_done:
        /* Not reached... */
 
 1:
+       /* If we boot on a non-zero cpu, all of the per-cpu
+        * variable references we make before setting up the
+        * per-cpu areas will use a bogus offset.  Put a
+        * compensating factor into __per_cpu_base to handle
+        * this cleanly.
+        *
+        * What the per-cpu code calculates is:
+        *
+        *      __per_cpu_base + (cpu << __per_cpu_shift)
+        *
+        * These two variables are zero initially, so to
+        * make it all cancel out to zero we need to put
+        * "0 - (cpu << 0)" into __per_cpu_base so that the
+        * above formula evaluates to zero.
+        *
+        * We cannot even perform a printk() until this stuff
+        * is setup as that calls cpu_clock() which uses
+        * per-cpu variables.
+        */
+       sub     %g0, %o0, %o1
+       sethi   %hi(__per_cpu_base), %o2
+       stx     %o1, [%o2 + %lo(__per_cpu_base)]
 #else
        mov     0, %o0
 #endif
        sth     %o0, [%g6 + TI_CPU]
 
+       call    prom_init_report
+        nop
+
        /* Off we go.... */
        call    start_kernel
         nop