void
cpu_fork(struct proc *p1, struct proc *p2, void *stack, size_t stacksize,
void (*func)(void *), void *arg)
{
struct pcb *pcbp;
struct trapframe *tf;
register_t sp, osp;
#ifdef DIAGNOSTIC
if (round_page(sizeof(struct user)) > NBPG)
panic("USPACE too small for user");
#endif
fpu_proc_save(p1);
pcbp = &p2->p_addr->u_pcb;
bcopy(&p1->p_addr->u_pcb, pcbp, sizeof(*pcbp));
/* space is cached for the copy{in,out}'s pleasure */
pcbp->pcb_space = p2->p_vmspace->vm_map.pmap->pm_space;
pcbp->pcb_fpstate = pool_get(&hppa_fppl, PR_WAITOK);
*pcbp->pcb_fpstate = *p1->p_addr->u_pcb.pcb_fpstate;
/* reset any of the pending FPU exceptions from parent */
pcbp->pcb_fpstate->hfp_regs.fpr_regs[0] =
HPPA_FPU_FORK(pcbp->pcb_fpstate->hfp_regs.fpr_regs[0]);
pcbp->pcb_fpstate->hfp_regs.fpr_regs[1] = 0;
pcbp->pcb_fpstate->hfp_regs.fpr_regs[2] = 0;
pcbp->pcb_fpstate->hfp_regs.fpr_regs[3] = 0;
p2->p_md.md_bpva = p1->p_md.md_bpva;
p2->p_md.md_bpsave[0] = p1->p_md.md_bpsave[0];
p2->p_md.md_bpsave[1] = p1->p_md.md_bpsave[1];
sp = (register_t)p2->p_addr + NBPG;
p2->p_md.md_regs = tf = (struct trapframe *)sp;
sp += sizeof(struct trapframe);
bcopy(p1->p_md.md_regs, tf, sizeof(*tf));
tf->tf_cr30 = (paddr_t)pcbp->pcb_fpstate;
tf->tf_sr0 = tf->tf_sr1 = tf->tf_sr2 = tf->tf_sr3 =
tf->tf_sr4 = tf->tf_sr5 = tf->tf_sr6 =
tf->tf_iisq_head = tf->tf_iisq_tail =
p2->p_vmspace->vm_map.pmap->pm_space;
tf->tf_pidr1 = tf->tf_pidr2 = pmap_sid2pid(tf->tf_sr0);
/*
* theoretically these could be inherited from the father,
* but just in case.
*/
tf->tf_sr7 = HPPA_SID_KERNEL;
mfctl(CR_EIEM, tf->tf_eiem);
tf->tf_ipsw = PSL_C | PSL_Q | PSL_P | PSL_D | PSL_I /* | PSL_L */ |
(curcpu()->ci_psw & PSL_O);
/*
* If specified, give the child a different stack.
*/
if (stack != NULL)
tf->tf_sp = (register_t)stack;
/*
* Build stack frames for the cpu_switchto & co.
*/
osp = sp + HPPA_FRAME_SIZE;
*(register_t*)(osp - HPPA_FRAME_SIZE) = 0;
*(register_t*)(osp + HPPA_FRAME_CRP) = (register_t)&switch_trampoline;
*(register_t*)(osp) = (osp - HPPA_FRAME_SIZE);
sp = osp + HPPA_FRAME_SIZE + 20*4; /* frame + calee-save registers */
*HPPA_FRAME_CARG(0, sp) = (register_t)arg;
*HPPA_FRAME_CARG(1, sp) = KERNMODE(func);
pcbp->pcb_ksp = sp;
}
void
cpu_fork(struct proc *p1, struct proc *p2, void *stack, size_t stacksize,
void (*func)(void *), void *arg)
{
extern register_t switch_tramp_p;
struct pcb *pcbp;
struct trapframe *tf;
register_t sp, osp;
#ifdef DIAGNOSTIC
if (round_page(sizeof(struct user) + sizeof(*tf)) > PAGE_SIZE)
panic("USPACE too small for user");
#endif
fpu_proc_save(p1);
pcbp = &p2->p_addr->u_pcb;
bcopy(&p1->p_addr->u_pcb, pcbp, sizeof(*pcbp));
/* space is cached for the copy{in,out}'s pleasure */
pcbp->pcb_space = p2->p_vmspace->vm_map.pmap->pm_space;
pcbp->pcb_fpstate = pool_get(&hppa_fppl, PR_WAITOK);
*pcbp->pcb_fpstate = *p1->p_addr->u_pcb.pcb_fpstate;
/* reset any of the pending FPU exceptions from parent */
pcbp->pcb_fpstate->hfp_regs.fpr_regs[0] =
HPPA_FPU_FORK(pcbp->pcb_fpstate->hfp_regs.fpr_regs[0]);
pcbp->pcb_fpstate->hfp_regs.fpr_regs[1] = 0;
pcbp->pcb_fpstate->hfp_regs.fpr_regs[2] = 0;
pcbp->pcb_fpstate->hfp_regs.fpr_regs[3] = 0;
sp = (register_t)p2->p_addr + PAGE_SIZE;
p2->p_md.md_regs = tf = (struct trapframe *)sp;
sp += sizeof(struct trapframe);
bcopy(p1->p_md.md_regs, tf, sizeof(*tf));
tf->tf_vtop = (paddr_t)p2->p_vmspace->vm_map.pmap->pm_pdir;
tf->tf_cr30 = (paddr_t)pcbp->pcb_fpstate;
tf->tf_sr0 = tf->tf_sr1 = tf->tf_sr2 = tf->tf_sr3 =
tf->tf_sr4 = tf->tf_sr5 = tf->tf_sr6 =
tf->tf_iisq[0] = tf->tf_iisq[1] =
p2->p_vmspace->vm_map.pmap->pm_space;
tf->tf_pidr1 = tf->tf_pidr2 = pmap_sid2pid(tf->tf_sr0);
/*
* theoretically these could be inherited from the father,
* but just in case.
*/
tf->tf_sr7 = HPPA_SID_KERNEL;
tf->tf_eiem = mfctl(CR_EIEM);
tf->tf_ipsw = PSL_C | PSL_Q | PSL_P | PSL_D | PSL_I /* | PSL_L */ |
PSL_O | PSL_W;
/*
* If specified, give the child a different stack.
*/
if (stack != NULL)
setstack(tf, (u_long)stack, 0); /* XXX ignore error? */
/*
* Build stack frames for the cpu_switchto & co.
*/
osp = sp + HPPA_FRAME_SIZE;
*(register_t*)(osp - HPPA_FRAME_SIZE) = 0;
*(register_t*)(osp + HPPA_FRAME_RP) = switch_tramp_p;
*(register_t*)(osp) = (osp - HPPA_FRAME_SIZE);
sp = osp + HPPA_FRAME_SIZE + 20*8; /* frame + callee-saved registers */
*(register_t*)(sp - HPPA_FRAME_SIZE + 0) = (register_t)arg;
*(register_t*)(sp - HPPA_FRAME_SIZE + 8) = KERNMODE(func);
*(register_t*)(sp - HPPA_FRAME_SIZE + 16) = 0; /* cpl */
pcbp->pcb_ksp = sp;
}