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sc7280: Add Modem region to avoid modem cleanup in Secboot reboot

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Modem uses different memory regions based on LTE/WiFi.
This adds correct carve-out to prevent region being disturbed.

BUG=b:182963902
TEST=Validated on qualcomm sc7280 developement board

Signed-off-by: T Michael Turney <quic_mturney@quicinc.com>
Change-Id: I56bfb210606b08893ff71dd1b6679f1ec102ec95
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58545
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Shelley Chen <shchen@google.com>
This commit is contained in:
T Michael Turney 2022-01-19 18:27:47 -08:00 committed by Shelley Chen
parent bfdc132436
commit 730107e6c1
5 changed files with 31 additions and 0 deletions
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1
src/soc/qualcomm/common/include/soc/symbols_common.h
View file

@ -25,5 +25,6 @@ DECLARE_REGION(dram_wlan)
DECLARE_REGION(dram_wpss)
DECLARE_REGION(shrm)
DECLARE_REGION(dram_cpucp)
DECLARE_REGION(dram_modem)
#endif // _SOC_QUALCOMM_SYMBOLS_COMMON_H_

2
src/soc/qualcomm/sc7280/Makefile.inc
View file

@ -31,10 +31,12 @@ romstage-y += ../common/qclib.c
romstage-y += ../common/mmu.c
romstage-y += mmu.c
romstage-y += ../common/usb/usb.c
romstage-y += carve_out.c
romstage-$(CONFIG_DRIVERS_UART) += ../common/qupv3_uart.c
################################################################################
ramstage-y += soc.c
ramstage-y += carve_out.c
ramstage-y += cbmem.c
ramstage-$(CONFIG_DRIVERS_UART) += ../common/qupv3_uart.c
ramstage-y += ../common/usb/usb.c

22
src/soc/qualcomm/sc7280/carve_out.c Normal file
View file

@ -0,0 +1,22 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#include <arch/stages.h>
#include <soc/mmu_common.h>
#include <soc/symbols_common.h>
#include <device/mmio.h>
#define MODEM_ONLY 0x004c5445
bool soc_modem_carve_out(void **start, void **end)
{
uint32_t modem_id = read32(_modem_id);
switch (modem_id) {
case MODEM_ONLY:
*start = _dram_modem;
*end = _edram_modem;
return true;
default:
return false;
}
}

1
src/soc/qualcomm/sc7280/memlayout.ld
View file

@ -56,6 +56,7 @@ SECTIONS
REGION(dram_soc, 0x80900000, 0x200000, 0x1000)
REGION(dram_cpucp,0x80B00000, 0x100000, 0x1000)
REGION(dram_wlan, 0x80C00000, 0xC00000, 0x1000)
REGION(dram_modem, 0x8B800000, 0xF600000, 0x1000)
REGION(dram_wpss, 0x9AE00000, 0x1900000, 0x1000)
POSTRAM_CBFS_CACHE(0x9F800000, 16M)
RAMSTAGE(0xA0800000, 16M)

5
src/soc/qualcomm/sc7280/soc.c
View file

@ -9,6 +9,9 @@
static void soc_read_resources(struct device *dev)
{
void *start = NULL;
void *end = NULL;
ram_resource(dev, 0, (uintptr_t)ddr_region->offset / KiB,
ddr_region->size / KiB);
reserved_ram_resource(dev, 1, (uintptr_t)_dram_soc / KiB,
@ -21,6 +24,8 @@ static void soc_read_resources(struct device *dev)
REGION_SIZE(dram_aop) / KiB);
reserved_ram_resource(dev, 5, (uintptr_t)_dram_cpucp / KiB,
REGION_SIZE(dram_cpucp) / KiB);
if (soc_modem_carve_out(&start, &end))
reserved_ram_resource(dev, 6, (uintptr_t)start / KiB, (end - start) / KiB);
}
static void soc_init(struct device *dev)