diff options
| author | Bin Meng <bmeng.cn@gmail.com> | 2017-04-21 07:24:34 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2017-05-17 17:11:46 +0800 |
| commit | 7d0d2efef82dcb88030a960aef09290e6e49f771 (patch) | |
| tree | 28df1c0c34e26541d6d8a4d0067cc032b5e414b0 /arch/x86 | |
| parent | e652e1304a9f3b59b3e47005ea19b5b6a3e799d1 (diff) | |
x86: fsp: Mark memory used by U-Boot as reserved in the E820 table for S3
U-Boot itself as well as everything that is consumed by U-Boot (like
heap, stack, dtb, etc) needs to be reserved and reported in the E820
table when S3 resume is on.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/Kconfig | 8 | ||||
| -rw-r--r-- | arch/x86/lib/fsp/fsp_dram.c | 12 |
2 files changed, 20 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index b5688524061..5322eff7fab 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -601,6 +601,14 @@ config HAVE_ACPI_RESUME is done, U-Boot needs to find out the wakeup vector provided by OSes and jump there. +config STACK_SIZE + hex + depends on HAVE_ACPI_RESUME + default 0x1000 + help + Estimated U-Boot's runtime stack size that needs to be reserved + during an ACPI S3 resume. + config MAX_PIRQ_LINKS int default 8 diff --git a/arch/x86/lib/fsp/fsp_dram.c b/arch/x86/lib/fsp/fsp_dram.c index 8b880cd5945..1a7af576d54 100644 --- a/arch/x86/lib/fsp/fsp_dram.c +++ b/arch/x86/lib/fsp/fsp_dram.c @@ -92,5 +92,17 @@ unsigned install_e820_map(unsigned max_entries, struct e820entry *entries) entries[num_entries].type = E820_RESERVED; num_entries++; +#ifdef CONFIG_HAVE_ACPI_RESUME + /* + * Everything between U-Boot's stack and ram top needs to be + * reserved in order for ACPI S3 resume to work. + */ + entries[num_entries].addr = gd->start_addr_sp - CONFIG_STACK_SIZE; + entries[num_entries].size = gd->ram_top - gd->start_addr_sp + \ + CONFIG_STACK_SIZE; + entries[num_entries].type = E820_RESERVED; + num_entries++; +#endif + return num_entries; } |