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x86: Move acpi_get_rsdp_addr() ACPI tables to the writer

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Move this over to use a writer file, moving the code from the x86
implementation.

There is no need to store a separate variable since we can simply access
the ACPI context.

With this, the original monolithic x86 function for writing ACPI tables
is gone.

Note that QEMU has its own implementation.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-12-01 09:03:03 -07:00
parent a7e53b93b1
commit 9d2adca8c3
2 changed files with 8 additions and 21 deletions
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21
arch/x86/lib/acpi_table.c
View file

@ -29,9 +29,6 @@
#include <dm/acpi.h>
#include <linux/err.h>
/* ACPI RSDP address to be used in boot parameters */
static ulong acpi_rsdp_addr;
static int acpi_create_madt_lapic(struct acpi_madt_lapic *lapic,
u8 cpu, u8 apic)
{
@ -513,24 +510,6 @@ int acpi_write_mcfg(struct acpi_ctx *ctx, const struct acpi_writer *entry)
}
ACPI_WRITER(5mcfg, "MCFG", acpi_write_mcfg, 0);
/*
* QEMU's version of write_acpi_tables is defined in drivers/misc/qfw.c
*/
int write_acpi_tables_x86(struct acpi_ctx *ctx,
const struct acpi_writer *entry)
{
acpi_rsdp_addr = (unsigned long)ctx->rsdp;
debug("ACPI: done\n");
return 0;
}
ACPI_WRITER(9x86, NULL, write_acpi_tables_x86, 0);
ulong acpi_get_rsdp_addr(void)
{
return acpi_rsdp_addr;
}
/**
* acpi_write_hpet() - Write out a HPET table
*

8
lib/acpi/acpi_writer.c
View file

@ -102,6 +102,14 @@ int write_dev_tables(struct acpi_ctx *ctx, const struct acpi_writer *entry)
return 0;
}
ACPI_WRITER(8dev, NULL, write_dev_tables, 0);
ulong acpi_get_rsdp_addr(void)
{
if (!gd->acpi_ctx)
return 0;
return map_to_sysmem(gd->acpi_ctx->rsdp);
}
#endif /* QEMU */
void acpi_setup_ctx(struct acpi_ctx *ctx, ulong start)