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Diffstat (limited to 'qemu/roms/openbios/arch/sparc32/context.c')
-rw-r--r--qemu/roms/openbios/arch/sparc32/context.c113
1 files changed, 0 insertions, 113 deletions
diff --git a/qemu/roms/openbios/arch/sparc32/context.c b/qemu/roms/openbios/arch/sparc32/context.c
deleted file mode 100644
index d4d8530d4..000000000
--- a/qemu/roms/openbios/arch/sparc32/context.c
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
- * context switching
- * 2003-10 by SONE Takeshi
- */
-
-#include "config.h"
-#include "kernel/kernel.h"
-#include "context.h"
-#include "libopenbios/sys_info.h"
-#include "boot.h"
-#include "openbios.h"
-
-#define MAIN_STACK_SIZE 16384
-#define IMAGE_STACK_SIZE 4096*2
-
-#define debug printk
-
-static void start_main(void); /* forward decl. */
-void __exit_context(void); /* assembly routine */
-
-/*
- * Main context structure
- * It is placed at the bottom of our stack, and loaded by assembly routine
- * to start us up.
- */
-static struct context main_ctx = {
- .regs[REG_SP] = (uint32_t) &_estack - 96,
- .pc = (uint32_t) start_main,
- .npc = (uint32_t) start_main + 4,
- .return_addr = (uint32_t) __exit_context,
-};
-
-/* This is used by assembly routine to load/store the context which
- * it is to switch/switched. */
-struct context *__context = &main_ctx;
-
-/* Stack for loaded ELF image */
-static uint8_t image_stack[IMAGE_STACK_SIZE];
-
-/* Pointer to startup context (physical address) */
-unsigned long __boot_ctx;
-
-/*
- * Main starter
- * This is the C function that runs first.
- */
-static void start_main(void)
-{
- /* Save startup context, so we can refer to it later.
- * We have to keep it in physical address since we will relocate. */
- __boot_ctx = virt_to_phys(__context);
-
- /* Start the real fun */
- openbios();
-
- /* Returning from here should jump to __exit_context */
- __context = boot_ctx;
-}
-
-/* Setup a new context using the given stack.
- */
-struct context *
-init_context(uint8_t *stack, uint32_t stack_size, int num_params)
-{
- struct context *ctx;
-
- ctx = (struct context *)
- (stack + stack_size - (sizeof(*ctx) + num_params*sizeof(uint32_t)));
- memset(ctx, 0, sizeof(*ctx));
-
- /* Fill in reasonable default for flat memory model */
- ctx->regs[REG_SP] = virt_to_phys(SP_LOC(ctx));
- ctx->return_addr = virt_to_phys(__exit_context);
-
- return ctx;
-}
-
-/* Switch to another context. */
-struct context *switch_to(struct context *ctx)
-{
- volatile struct context *save;
- struct context *ret;
-
- debug("switching to new context:\n");
- save = __context;
- __context = ctx;
- asm __volatile__ ("\n\tcall __switch_context"
- "\n\tnop" ::: "g1", "g2", "g3", "g4", "g5", "g6", "g7",
- "o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7",
- "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
- "i0", "i1", "i2", "i3", "i4", "i5", "i7",
- "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8", "f9",
- "f10", "f11", "f12", "f13", "f14", "f15", "f16", "f17", "f18", "f19",
- "f20", "f21", "f22", "f23", "f24", "f25", "f26", "f27", "f28", "f29",
- "f30", "f31",
- "memory");
- ret = __context;
- __context = (struct context *)save;
- return ret;
-}
-
-/* Start ELF Boot image */
-unsigned int start_elf(unsigned long entry_point, unsigned long param)
-{
- struct context *ctx;
-
- ctx = init_context(image_stack, sizeof image_stack, 1);
- ctx->pc = entry_point;
- ctx->param[0] = param;
-
- ctx = switch_to(ctx);
- return ctx->regs[REG_O0];
-}