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dm: core: Allow storing priv/plat data separately

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At present the device priv/data data allocated by dtoc is stored in the
data section along with other variables. On some platforms it is better
to allocate space for it separately, e.g. if SPL is running from read-only
memory.

Create a new space with the same size as that allocated by dtoc, ready for
use.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2021-03-15 17:25:38 +13:00
parent 6f644efdd8
commit baf0371883
3 changed files with 25 additions and 0 deletions
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12
drivers/core/root.c
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@@ -11,6 +11,7 @@
#include <fdtdec.h>
#include <log.h>
#include <malloc.h>
#include <asm-generic/sections.h>
#include <asm/global_data.h>
#include <linux/libfdt.h>
#include <dm/acpi.h>
@@ -135,7 +136,9 @@ static int dm_setup_inst(void)
if (CONFIG_IS_ENABLED(OF_PLATDATA_RT)) {
struct udevice_rt *urt;
void *base;
int n_ents;
uint size;
/* Allocate the udevice_rt table */
n_ents = ll_entry_count(struct udevice, udevice);
@@ -143,6 +146,15 @@ static int dm_setup_inst(void)
if (!urt)
return log_msg_ret("urt", -ENOMEM);
gd_set_dm_udevice_rt(urt);
/* Now allocate space for the priv/plat data, and copy it in */
size = __priv_data_end - __priv_data_start;
base = calloc(1, size);
if (!base)
return log_msg_ret("priv", -ENOMEM);
memcpy(base, __priv_data_start, size);
gd_set_dm_priv_base(base);
}
return 0;