static int __init acpi_read_sdt_at(void *sdt_va,
struct acpi_sdt_hdr * tb,
size_t size,
const char * name)
{
struct acpi_sdt_hdr hdr;
/* if NULL is supplied, we only return the size of the table */
if (tb == NULL) {
memcpy(&hdr, sdt_va, sizeof(struct acpi_sdt_hdr));
return hdr.len;
}
memcpy(tb, sdt_va, sizeof(struct acpi_sdt_hdr));
if (acpi_check_signature((const char *)tb->signature,
(const char *)name)) {
vmm_printf("ACPI ERROR: acpi %s signature does not match\n", name);
return VMM_EFAIL;
}
if (size < tb->len) {
vmm_printf("ACPI ERROR: acpi buffer too small for %s\n", name);
return VMM_EFAIL;
}
memcpy(tb, sdt_va, size);
if (acpi_check_csum(tb, tb->len)) {
vmm_printf("ACPI ERROR: acpi %s checksum does not match\n", name);
return VMM_EFAIL;
}
return tb->len;
}
static int acpi_read_sdt_at(phys_bytes addr,
struct acpi_sdt_header * tb,
size_t size,
const char * name)
{
struct acpi_sdt_header hdr;
/* if NULL is supplied, we only return the size of the table */
if (tb == NULL) {
if (read_func(addr, &hdr, sizeof(struct acpi_sdt_header))) {
printf("ERROR acpi cannot read %s header\n", name);
return -1;
}
return hdr.length;
}
if (read_func(addr, tb, sizeof(struct acpi_sdt_header))) {
printf("ERROR acpi cannot read %s header\n", name);
return -1;
}
if (acpi_check_signature(tb->signature, name)) {
printf("ERROR acpi %s signature does not match\n", name);
return -1;
}
if (size < tb->length) {
printf("ERROR acpi buffer too small for %s\n", name);
return -1;
}
if (read_func(addr, tb, size)) {
printf("ERROR acpi cannot read %s\n", name);
return -1;
}
if (acpi_check_csum(tb, tb->length)) {
printf("ERROR acpi %s checksum does not match\n", name);
return -1;
}
return tb->length;
}
static int acpi_read_sdt_at(physical_addr_t addr,
struct acpi_sdt_hdr * tb,
size_t size,
const char * name)
{
struct acpi_sdt_hdr hdr;
void *sdt_va = NULL;
sdt_va = (void *)vmm_host_iomap(addr, PAGE_SIZE);
if (unlikely(!sdt_va)) {
vmm_printf("ACPI ERROR: Failed to map physical address 0x%x.\n",
__func__, addr);
return VMM_EFAIL;
}
/* if NULL is supplied, we only return the size of the table */
if (tb == NULL) {
vmm_memcpy(&hdr, sdt_va, sizeof(struct acpi_sdt_hdr));
return hdr.len;
}
vmm_memcpy(tb, sdt_va, sizeof(struct acpi_sdt_hdr));
if (acpi_check_signature((const char *)tb->signature,
(const char *)name)) {
vmm_printf("ACPI ERROR: acpi %s signature does not match\n", name);
return VMM_EFAIL;
}
if (size < tb->len) {
vmm_printf("ACPI ERROR: acpi buffer too small for %s\n", name);
return VMM_EFAIL;
}
vmm_memcpy(tb, sdt_va, size);
if (acpi_check_csum(tb, tb->len)) {
vmm_printf("ACPI ERROR: acpi %s checksum does not match\n", name);
return VMM_EFAIL;
}
return tb->len;
}