/*
* Copyright 2005, Ingo Weinhold <bonefish@cs.tu-berlin.de>.
* All rights reserved. Distributed under the terms of the MIT License.
*/
#define FUNCTION(x) .global x
/* status_t arch_start_kernel(struct kernel_args *kernelArgs,
addr_t kernelEntry, addr_t kernelStackTop)
o0 - kernelArgs
o1 - kernelEntry
o2 - kernelStackTop
*/
FUNCTION(arch_start_kernel):
save %sp, -176, %sp
// Now we have
// - Kernel args in i0
// - Kernel entry in i1
// - Kernel stack top in i2
// Set the stack, adding the stack bias
sub %i2, 2047, %sp // apply stack bias
// We need to call the kernel with:
// o0 = kernel args
// o1 = current CPU
mov %i0, %o0
// Current CPU is always 0 on boot
mov %g0, %o1
// Jump into the kernel, store return address in o7
jmpl %i1, %o7
nop // branch delay slot...
// We should never get here, but in case the kernel returns, attempt to
// exit cleanly.
// Forward the return code to the caller
mov %o0, %i0
// Since we saved our context at the start of this function,
// a simple "return" should do the job and restore the previous register
// window and put us back on the old stack
return %i7 + 8
nop // Branch delay slot...
