diff options
| author | York Sun <york.sun@nxp.com> | 2017-03-06 09:02:24 -0800 |
|---|---|---|
| committer | York Sun <york.sun@nxp.com> | 2017-03-14 08:44:03 -0700 |
| commit | f2ccf7f7aacf75bd9c521459d1d20df07d1ebe41 (patch) | |
| tree | 2e070deb61f5e223d3b4d3f4433cb4006bdd7590 /arch/arm | |
| parent | 8537ddd769f460d7fb7a62a3dcc9669049702e51 (diff) | |
armv8: Add global variable resv_ram
Use gd->arch.resv_ram to track reserved memory allocation.
Signed-off-by: York Sun <york.sun@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/cpu/armv8/fsl-layerscape/Kconfig | 10 | ||||
| -rw-r--r-- | arch/arm/include/asm/global_data.h | 7 |
2 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig index b5609ff7a6..b8b9cd58c4 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig +++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig @@ -277,6 +277,16 @@ config SYS_FSL_SDHC_CLK_DIV clock, in another word SDHC_clk = Platform_clk / this_divider. endmenu +config RESV_RAM + bool + help + Reserve memory from the top, tracked by gd->arch.resv_ram. This + reserved RAM can be used by special driver that resides in memory + after U-Boot exits. It's up to implementation to allocate and allow + access to this reserved memory. For example, the reserved RAM can + be at the high end of physical memory. The reserve RAM may be + excluded from memory bank(s) passed to OS, or marked as reserved. + config SYS_FSL_ERRATUM_A008336 bool diff --git a/arch/arm/include/asm/global_data.h b/arch/arm/include/asm/global_data.h index aee87cdcbf..dfcbcceba3 100644 --- a/arch/arm/include/asm/global_data.h +++ b/arch/arm/include/asm/global_data.h @@ -59,6 +59,13 @@ struct arch_global_data { phys_addr_t secure_ram; unsigned long tlb_allocated; #endif +#ifdef CONFIG_RESV_RAM + /* + * Reserved RAM for memory resident, eg. Management Complex (MC) + * driver which continues to run after U-Boot exits. + */ + phys_addr_t resv_ram; +#endif #ifdef CONFIG_ARCH_OMAP2 u32 omap_boot_device; |