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30#include "qemu/osdep.h"
31#include "qom/object.h"
32#include "sysemu/sysemu.h"
33#include "hw/pci-host/pam.h"
34
35void init_pam(DeviceState *dev, MemoryRegion *ram_memory,
36 MemoryRegion *system_memory, MemoryRegion *pci_address_space,
37 PAMMemoryRegion *mem, uint32_t start, uint32_t size)
38{
39 int i;
40
41
42 memory_region_init_alias(&mem->alias[3], OBJECT(dev), "pam-ram", ram_memory,
43 start, size);
44
45 memory_region_init_alias(&mem->alias[1], OBJECT(dev), "pam-rom", ram_memory,
46 start, size);
47 memory_region_set_readonly(&mem->alias[1], true);
48
49
50 memory_region_init_alias(&mem->alias[0], OBJECT(dev), "pam-pci", pci_address_space,
51 start, size);
52 memory_region_init_alias(&mem->alias[2], OBJECT(dev), "pam-pci", ram_memory,
53 start, size);
54
55 memory_region_transaction_begin();
56 for (i = 0; i < 4; ++i) {
57 memory_region_set_enabled(&mem->alias[i], false);
58 memory_region_add_subregion_overlap(system_memory, start,
59 &mem->alias[i], 1);
60 }
61 memory_region_transaction_commit();
62 mem->current = 0;
63}
64
65void pam_update(PAMMemoryRegion *pam, int idx, uint8_t val)
66{
67 assert(0 <= idx && idx <= 12);
68
69 memory_region_set_enabled(&pam->alias[pam->current], false);
70 pam->current = (val >> ((!(idx & 1)) * 4)) & PAM_ATTR_MASK;
71 memory_region_set_enabled(&pam->alias[pam->current], true);
72}
73