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-rw-r--r--arch/sparc64/prom/cif.S225
1 files changed, 225 insertions, 0 deletions
diff --git a/arch/sparc64/prom/cif.S b/arch/sparc64/prom/cif.S
new file mode 100644
index 00000000000..29d0ae74aed
--- /dev/null
+++ b/arch/sparc64/prom/cif.S
@@ -0,0 +1,225 @@
+/* cif.S: PROM entry/exit assembler trampolines.
+ *
+ * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ * Copyright (C) 2005 David S. Miller <davem@davemloft.net>
+ */
+
+#include <asm/pstate.h>
+
+ .text
+ .globl prom_cif_interface
+prom_cif_interface:
+ sethi %hi(p1275buf), %o0
+ or %o0, %lo(p1275buf), %o0
+ ldx [%o0 + 0x010], %o1 ! prom_cif_stack
+ save %o1, -0x190, %sp
+ ldx [%i0 + 0x008], %l2 ! prom_cif_handler
+ rdpr %pstate, %l4
+ wrpr %g0, 0x15, %pstate ! save alternate globals
+ stx %g1, [%sp + 2047 + 0x0b0]
+ stx %g2, [%sp + 2047 + 0x0b8]
+ stx %g3, [%sp + 2047 + 0x0c0]
+ stx %g4, [%sp + 2047 + 0x0c8]
+ stx %g5, [%sp + 2047 + 0x0d0]
+ stx %g6, [%sp + 2047 + 0x0d8]
+ stx %g7, [%sp + 2047 + 0x0e0]
+ wrpr %g0, 0x814, %pstate ! save interrupt globals
+ stx %g1, [%sp + 2047 + 0x0e8]
+ stx %g2, [%sp + 2047 + 0x0f0]
+ stx %g3, [%sp + 2047 + 0x0f8]
+ stx %g4, [%sp + 2047 + 0x100]
+ stx %g5, [%sp + 2047 + 0x108]
+ stx %g6, [%sp + 2047 + 0x110]
+ stx %g7, [%sp + 2047 + 0x118]
+ wrpr %g0, 0x14, %pstate ! save normal globals
+ stx %g1, [%sp + 2047 + 0x120]
+ stx %g2, [%sp + 2047 + 0x128]
+ stx %g3, [%sp + 2047 + 0x130]
+ stx %g4, [%sp + 2047 + 0x138]
+ stx %g5, [%sp + 2047 + 0x140]
+ stx %g6, [%sp + 2047 + 0x148]
+ stx %g7, [%sp + 2047 + 0x150]
+ wrpr %g0, 0x414, %pstate ! save mmu globals
+ stx %g1, [%sp + 2047 + 0x158]
+ stx %g2, [%sp + 2047 + 0x160]
+ stx %g3, [%sp + 2047 + 0x168]
+ stx %g4, [%sp + 2047 + 0x170]
+ stx %g5, [%sp + 2047 + 0x178]
+ stx %g6, [%sp + 2047 + 0x180]
+ stx %g7, [%sp + 2047 + 0x188]
+ mov %g1, %l0 ! also save to locals, so we can handle
+ mov %g2, %l1 ! tlb faults later on, when accessing
+ mov %g3, %l3 ! the stack.
+ mov %g7, %l5
+ wrpr %l4, PSTATE_IE, %pstate ! turn off interrupts
+ call %l2
+ add %i0, 0x018, %o0 ! prom_args
+ wrpr %g0, 0x414, %pstate ! restore mmu globals
+ mov %l0, %g1
+ mov %l1, %g2
+ mov %l3, %g3
+ mov %l5, %g7
+ wrpr %g0, 0x14, %pstate ! restore normal globals
+ ldx [%sp + 2047 + 0x120], %g1
+ ldx [%sp + 2047 + 0x128], %g2
+ ldx [%sp + 2047 + 0x130], %g3
+ ldx [%sp + 2047 + 0x138], %g4
+ ldx [%sp + 2047 + 0x140], %g5
+ ldx [%sp + 2047 + 0x148], %g6
+ ldx [%sp + 2047 + 0x150], %g7
+ wrpr %g0, 0x814, %pstate ! restore interrupt globals
+ ldx [%sp + 2047 + 0x0e8], %g1
+ ldx [%sp + 2047 + 0x0f0], %g2
+ ldx [%sp + 2047 + 0x0f8], %g3
+ ldx [%sp + 2047 + 0x100], %g4
+ ldx [%sp + 2047 + 0x108], %g5
+ ldx [%sp + 2047 + 0x110], %g6
+ ldx [%sp + 2047 + 0x118], %g7
+ wrpr %g0, 0x15, %pstate ! restore alternate globals
+ ldx [%sp + 2047 + 0x0b0], %g1
+ ldx [%sp + 2047 + 0x0b8], %g2
+ ldx [%sp + 2047 + 0x0c0], %g3
+ ldx [%sp + 2047 + 0x0c8], %g4
+ ldx [%sp + 2047 + 0x0d0], %g5
+ ldx [%sp + 2047 + 0x0d8], %g6
+ ldx [%sp + 2047 + 0x0e0], %g7
+ wrpr %l4, 0, %pstate ! restore original pstate
+ ret
+ restore
+
+ .globl prom_cif_callback
+prom_cif_callback:
+ sethi %hi(p1275buf), %o1
+ or %o1, %lo(p1275buf), %o1
+ save %sp, -0x270, %sp
+ rdpr %pstate, %l4
+ wrpr %g0, 0x15, %pstate ! save PROM alternate globals
+ stx %g1, [%sp + 2047 + 0x0b0]
+ stx %g2, [%sp + 2047 + 0x0b8]
+ stx %g3, [%sp + 2047 + 0x0c0]
+ stx %g4, [%sp + 2047 + 0x0c8]
+ stx %g5, [%sp + 2047 + 0x0d0]
+ stx %g6, [%sp + 2047 + 0x0d8]
+ stx %g7, [%sp + 2047 + 0x0e0]
+ ! restore Linux alternate globals
+ ldx [%sp + 2047 + 0x190], %g1
+ ldx [%sp + 2047 + 0x198], %g2
+ ldx [%sp + 2047 + 0x1a0], %g3
+ ldx [%sp + 2047 + 0x1a8], %g4
+ ldx [%sp + 2047 + 0x1b0], %g5
+ ldx [%sp + 2047 + 0x1b8], %g6
+ ldx [%sp + 2047 + 0x1c0], %g7
+ wrpr %g0, 0x814, %pstate ! save PROM interrupt globals
+ stx %g1, [%sp + 2047 + 0x0e8]
+ stx %g2, [%sp + 2047 + 0x0f0]
+ stx %g3, [%sp + 2047 + 0x0f8]
+ stx %g4, [%sp + 2047 + 0x100]
+ stx %g5, [%sp + 2047 + 0x108]
+ stx %g6, [%sp + 2047 + 0x110]
+ stx %g7, [%sp + 2047 + 0x118]
+ ! restore Linux interrupt globals
+ ldx [%sp + 2047 + 0x1c8], %g1
+ ldx [%sp + 2047 + 0x1d0], %g2
+ ldx [%sp + 2047 + 0x1d8], %g3
+ ldx [%sp + 2047 + 0x1e0], %g4
+ ldx [%sp + 2047 + 0x1e8], %g5
+ ldx [%sp + 2047 + 0x1f0], %g6
+ ldx [%sp + 2047 + 0x1f8], %g7
+ wrpr %g0, 0x14, %pstate ! save PROM normal globals
+ stx %g1, [%sp + 2047 + 0x120]
+ stx %g2, [%sp + 2047 + 0x128]
+ stx %g3, [%sp + 2047 + 0x130]
+ stx %g4, [%sp + 2047 + 0x138]
+ stx %g5, [%sp + 2047 + 0x140]
+ stx %g6, [%sp + 2047 + 0x148]
+ stx %g7, [%sp + 2047 + 0x150]
+ ! restore Linux normal globals
+ ldx [%sp + 2047 + 0x200], %g1
+ ldx [%sp + 2047 + 0x208], %g2
+ ldx [%sp + 2047 + 0x210], %g3
+ ldx [%sp + 2047 + 0x218], %g4
+ ldx [%sp + 2047 + 0x220], %g5
+ ldx [%sp + 2047 + 0x228], %g6
+ ldx [%sp + 2047 + 0x230], %g7
+ wrpr %g0, 0x414, %pstate ! save PROM mmu globals
+ stx %g1, [%sp + 2047 + 0x158]
+ stx %g2, [%sp + 2047 + 0x160]
+ stx %g3, [%sp + 2047 + 0x168]
+ stx %g4, [%sp + 2047 + 0x170]
+ stx %g5, [%sp + 2047 + 0x178]
+ stx %g6, [%sp + 2047 + 0x180]
+ stx %g7, [%sp + 2047 + 0x188]
+ ! restore Linux mmu globals
+ ldx [%sp + 2047 + 0x238], %o0
+ ldx [%sp + 2047 + 0x240], %o1
+ ldx [%sp + 2047 + 0x248], %l2
+ ldx [%sp + 2047 + 0x250], %l3
+ ldx [%sp + 2047 + 0x258], %l5
+ ldx [%sp + 2047 + 0x260], %l6
+ ldx [%sp + 2047 + 0x268], %l7
+ ! switch to Linux tba
+ sethi %hi(sparc64_ttable_tl0), %l1
+ rdpr %tba, %l0 ! save PROM tba
+ mov %o0, %g1
+ mov %o1, %g2
+ mov %l2, %g3
+ mov %l3, %g4
+ mov %l5, %g5
+ mov %l6, %g6
+ mov %l7, %g7
+ wrpr %l1, %tba ! install Linux tba
+ wrpr %l4, 0, %pstate ! restore PSTATE
+ call prom_world
+ mov %g0, %o0
+ ldx [%i1 + 0x000], %l2
+ call %l2
+ mov %i0, %o0
+ mov %o0, %l1
+ call prom_world
+ or %g0, 1, %o0
+ wrpr %g0, 0x14, %pstate ! interrupts off
+ ! restore PROM mmu globals
+ ldx [%sp + 2047 + 0x158], %o0
+ ldx [%sp + 2047 + 0x160], %o1
+ ldx [%sp + 2047 + 0x168], %l2
+ ldx [%sp + 2047 + 0x170], %l3
+ ldx [%sp + 2047 + 0x178], %l5
+ ldx [%sp + 2047 + 0x180], %l6
+ ldx [%sp + 2047 + 0x188], %l7
+ wrpr %g0, 0x414, %pstate ! restore PROM mmu globals
+ mov %o0, %g1
+ mov %o1, %g2
+ mov %l2, %g3
+ mov %l3, %g4
+ mov %l5, %g5
+ mov %l6, %g6
+ mov %l7, %g7
+ wrpr %l0, %tba ! restore PROM tba
+ wrpr %g0, 0x14, %pstate ! restore PROM normal globals
+ ldx [%sp + 2047 + 0x120], %g1
+ ldx [%sp + 2047 + 0x128], %g2
+ ldx [%sp + 2047 + 0x130], %g3
+ ldx [%sp + 2047 + 0x138], %g4
+ ldx [%sp + 2047 + 0x140], %g5
+ ldx [%sp + 2047 + 0x148], %g6
+ ldx [%sp + 2047 + 0x150], %g7
+ wrpr %g0, 0x814, %pstate ! restore PROM interrupt globals
+ ldx [%sp + 2047 + 0x0e8], %g1
+ ldx [%sp + 2047 + 0x0f0], %g2
+ ldx [%sp + 2047 + 0x0f8], %g3
+ ldx [%sp + 2047 + 0x100], %g4
+ ldx [%sp + 2047 + 0x108], %g5
+ ldx [%sp + 2047 + 0x110], %g6
+ ldx [%sp + 2047 + 0x118], %g7
+ wrpr %g0, 0x15, %pstate ! restore PROM alternate globals
+ ldx [%sp + 2047 + 0x0b0], %g1
+ ldx [%sp + 2047 + 0x0b8], %g2
+ ldx [%sp + 2047 + 0x0c0], %g3
+ ldx [%sp + 2047 + 0x0c8], %g4
+ ldx [%sp + 2047 + 0x0d0], %g5
+ ldx [%sp + 2047 + 0x0d8], %g6
+ ldx [%sp + 2047 + 0x0e0], %g7
+ wrpr %l4, 0, %pstate
+ ret
+ restore %l1, 0, %o0
+
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-24 21:57:16 +0000