/*! Create initial context for thread - it should start with defined function
(context is identical to interrupt frame - use same code to start/return) */
void arch_create_thread_context ( context_t *context,
void (func) (void *), void *param, void (*thread_exit)(),
void *stack, size_t stack_size )
{
/* thread stack */
context->context.esp = stack + stack_size;
/* put starting thread function parameter on stack */
*( --context->context.esp ) = (uint32) param;
/* return address (when thread exits */
*( --context->context.esp ) = (uint32) thread_exit;
/* interrupt frame */
context->context.eflags = INIT_EFLAGS;
context->context.cs = GDT_DESCRIPTOR ( SEGM_T_CODE, GDT, PRIV_USER );
context->context.eip = (uint32) func;
context->context.ss = context->context.ds = context->context.es =
context->context.fs = context->context.gs = context->context.ss =
GDT_DESCRIPTOR ( SEGM_T_DATA, GDT, PRIV_USER );
/* rest of context is not relevant for new thread */
#ifdef DEBUG
context->context.err = 0;
context->context.eax = context->context.ecx = context->context.edx =
context->context.ebx = context->context.ebp = context->context.esi =
context->context.edi = 0;
#endif
}
/*! Set up context (normal and interrupt=kernel) */
void arch_context_init ()
{
arch_thr_context_ss = GDT_DESCRIPTOR ( SEGM_K_DATA, GDT, PRIV_KERNEL );
arch_interrupt_stack = (void *) &system_stack [ KERNEL_STACK_SIZE ];
arch_descriptors_init (); /* GDT, IDT, ... */
}
/*! Create initial context for thread - it should start with defined function
(context is identical to interrupt frame - use same code to start/return) */
void arch_create_thread_context ( context_t *context,
void (func) (void *), void *param, void (*thread_exit)(),
void *stack, size_t stack_size, void *proc )
{
/* thread stack */
context->context.esp = stack + stack_size;
/* put exit status on stack */
*( --context->context.esp ) = (uint32) 0;
/* put starting thread function parameter on stack */
*( --context->context.esp ) = (uint32) param;
/* return address (when thread exits) */
*( --context->context.esp ) = (uint32) thread_exit;
/* interrupt frame */
context->context.eflags = INIT_EFLAGS;
context->context.cs = GDT_DESCRIPTOR ( SEGM_T_CODE, GDT, PRIV_USER );
context->context.eip = (uint32) func;
context->context.ss = context->context.ds = context->context.es =
context->context.fs = context->context.gs = context->context.ss =
GDT_DESCRIPTOR ( SEGM_T_DATA, GDT, PRIV_USER );
/* rest of context is not relevant for new thread */
#ifdef DEBUG
context->context.err = 0;
context->context.eax = context->context.ecx = context->context.edx =
context->context.ebx = context->context.ebp = context->context.esi =
context->context.edi = 0;
#endif
context->proc = proc;
context->context.esp = K2U_GET_ADR ( context->context.esp, proc );
/* stack pointer (as eip) must be in process relative addresses */
#ifdef USE_SSE
if ( arch_sse_supported )
{
context->sse_mmx_fpu_start = kmalloc ( SSE_CNTX_SIZE + SSE_CNTX_ALIGN );
/* align on 16 byte address */
context->sse_mmx_fpu =
(((uint32) context->sse_mmx_fpu_start) + SSE_CNTX_ALIGN-1) & 0xfffffff0;
}
#endif
}
/*! Create initial context for thread - it should start with defined function
(context is identical to interrupt frame - use same code to start/return) */
void arch_create_thread_context ( context_t *context,
void (func) (void *), void *param, void (*thread_exit)(),
void *stack, size_t stack_size )
{
uint32 *tstack;
/* thread stack */
tstack = stack + stack_size;
/* put starting thread function parameter on stack */
*( --tstack ) = (uint32) param;
/* return address (when thread exits */
*( --tstack ) = (uint32) thread_exit;
/* thread context is on stack */
context->context = (void *) tstack - sizeof (arch_context_t);
/* interrupt frame */
context->context->eflags = INIT_EFLAGS;
context->context->cs = GDT_DESCRIPTOR ( SEGM_CODE, GDT, PRIV_KERNEL );
context->context->eip = (uint32) func;
/* rest of context is not relevant for new thread */
}
