static inline kern_return_t chudxnu_private_task_read_bytes(task_t task, vm_offset_t addr, int size, void *data)
{
kern_return_t ret;
if(task==kernel_task) {
if(size==sizeof(unsigned int)) {
addr64_t phys_addr;
ppnum_t pp;
pp = pmap_find_phys(kernel_pmap, addr); /* Get the page number */
if(!pp) return KERN_FAILURE; /* Not mapped... */
phys_addr = ((addr64_t)pp << 12) | (addr & 0x0000000000000FFFULL); /* Shove in the page offset */
if(phys_addr < mem_actual) { /* Sanity check: is it in memory? */
*((uint32_t *)data) = ml_phys_read_64(phys_addr);
return KERN_SUCCESS;
}
} else {
return KERN_FAILURE;
}
} else {
ret = KERN_SUCCESS; /* Assume everything worked */
if(copyin((void *)addr, data, size)) ret = KERN_FAILURE; /* Get memory, if non-zero rc, it didn't work */
return ret;
}
}
/*
* Read the memory location at physical address paddr.
* This is a part of a device probe, so there is a good chance we will
* have a machine check here. So we have to be able to handle that.
* We assume that machine checks are enabled both in MSR and HIDs
*/
boolean_t
ml_probe_read_64(addr64_t paddr64, unsigned int *val)
{
if ((PAGE_SIZE - (paddr64 & PAGE_MASK)) < 4)
return FALSE;
*val = ml_phys_read_64((pmap_paddr_t)paddr64);
return TRUE;
}
