diff options
| author | Simon Glass <sjg@chromium.org> | 2020-09-22 12:45:17 -0600 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2020-09-25 11:27:19 +0800 |
| commit | 94c5ad2534248e562abf1b083cc308fc1b3cd1e1 (patch) | |
| tree | 081f184828da9829a243298bced54f3d1b86888b /arch/x86/include/asm | |
| parent | 540f0bae9bd0e19d00d11796a62a08f94d895189 (diff) | |
| download | u-boot-94c5ad2534248e562abf1b083cc308fc1b3cd1e1.tar.gz u-boot-94c5ad2534248e562abf1b083cc308fc1b3cd1e1.tar.xz u-boot-94c5ad2534248e562abf1b083cc308fc1b3cd1e1.zip | |
x86: apl: Allow reading hostbridge base addresses
Add a few functions to permit reading of various useful base addresses
provided by the hostbridge.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/arch-apollolake/systemagent.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/x86/include/asm/arch-apollolake/systemagent.h b/arch/x86/include/asm/arch-apollolake/systemagent.h index 9e7bd62751..788a63d799 100644 --- a/arch/x86/include/asm/arch-apollolake/systemagent.h +++ b/arch/x86/include/asm/arch-apollolake/systemagent.h @@ -35,4 +35,35 @@ */ void enable_bios_reset_cpl(void); +/** + * sa_get_tolud_base() - Get the TOLUD base address + * + * This returns the Top Of Low Useable DRAM, marking the top of usable DRAM + * below 4GB + * + * @dev: hostbridge device + * @return TOLUD address + */ +ulong sa_get_tolud_base(struct udevice *dev); + +/** + * sa_get_gsm_base() - Get the GSM base address + * + * This returns the base of GTT Stolen Memory, marking the start of memory used + * for Graphics Translation Tables. + * + * @dev: hostbridge device + * @return GSM address + */ +ulong sa_get_gsm_base(struct udevice *dev); + +/** + * sa_get_tseg_base() - Get the TSEG base address + * + * This returns the top address of DRAM available below 4GB + * + * @return TSEG base + */ +ulong sa_get_tseg_base(struct udevice *dev); + #endif |