smallsolar/u-boot
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

acpi: Write pointers to tables instead of addresses

Browse Source 
Sandbox uses an API to map between addresses and pointers. This allows
it to have (emulated) memory at zero and avoid arch-specific addressing
details. It also allows memory-mapped peripherals to work.

As an example, on many machines sandbox maps address 100 to pointer
value 10000000.

However this is not correct for ACPI, if sandbox starts another program
(e.g EFI app) and passes it the tables. That app has no knowledge of
sandbox's address mapping. So to make this work we want to store
10000000 as the value in the table.

Add two new 'nomap' functions which clearly make this exeption to how
sandbox works.

This should allow EFI apps to access ACPI tables with sandbox, e.g. for
testing purposes.

Signed-off-by: Simon Glass <sjg@chromium.org>
Suggested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Simon Glass
2023-12-31 08:25:54 -07:00
parent 5e3adc44a4
commit a8efebe719
8 changed files with 58 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
cmd/acpi.c
View File

@@ -45,7 +45,7 @@ static int dump_table_name(const char *sig)
if (!hdr)
return -ENOENT;
printf("%.*s @ %16lx\n", ACPI_NAME_LEN, hdr->signature,
(ulong)map_to_sysmem(hdr));
(ulong)nomap_to_sysmem(hdr));
print_buffer(0, hdr, 1, hdr->length, 0);
return 0;
@@ -54,9 +54,9 @@ static int dump_table_name(const char *sig)
static void list_fadt(struct acpi_fadt *fadt)
{
if (fadt->dsdt)
dump_hdr(map_sysmem(fadt->dsdt, 0));
dump_hdr(nomap_sysmem(fadt->dsdt, 0));
if (fadt->firmware_ctrl)
dump_hdr(map_sysmem(fadt->firmware_ctrl, 0));
dump_hdr(nomap_sysmem(fadt->firmware_ctrl, 0));
}
static void list_rsdt(struct acpi_rsdp *rsdp)
@@ -66,11 +66,11 @@ static void list_rsdt(struct acpi_rsdp *rsdp)
struct acpi_xsdt *xsdt;
if (rsdp->rsdt_address) {
rsdt = map_sysmem(rsdp->rsdt_address, 0);
rsdt = nomap_sysmem(rsdp->rsdt_address, 0);
dump_hdr(&rsdt->header);
}
if (rsdp->xsdt_address) {
xsdt = map_sysmem(rsdp->xsdt_address, 0);
xsdt = nomap_sysmem(rsdp->xsdt_address, 0);
dump_hdr(&xsdt->header);
len = xsdt->header.length - sizeof(xsdt->header);
count = len / sizeof(u64);
@@ -91,7 +91,7 @@ static void list_rsdt(struct acpi_rsdp *rsdp)
entry = rsdt->entry[i];
if (!entry)
break;
hdr = map_sysmem(entry, 0);
hdr = nomap_sysmem(entry, 0);
dump_hdr(hdr);
if (!memcmp(hdr->signature, "FACP", ACPI_NAME_LEN))
list_fadt((struct acpi_fadt *)hdr);