[PATCH] arm64: versal: Increase the number of DRAM banks to 36
From: Venkatesh Yadav Abbarapu venkatesh.abbarapu@amd.com
HBM stands for high bandwidth memory and is a type of memory interface used in 3D-stacked DRAM (dynamic random access memory) in some AMD GPUs (aka graphics cards), as well as the server, high-performance computing (HPC) and networking and client space. High Bandwidth Memory(HBM) has total 16 channels, one channel is divided into two pseudo channels which makes its 32 banks each with some amount of memory. And then we have DDR_LOW PS low, DDR_HIGH0 PS high, DDR_HIGH1 PS very high and pretty much there should be also place for PL DDR. So maximum number of memory banks will be 36, updating the CONFIG_NR_DRAM_BANKS to 36.
Signed-off-by: Venkatesh Yadav Abbarapu venkatesh.abbarapu@amd.com Signed-off-by: Michal Simek michal.simek@amd.com ---
configs/xilinx_versal_virt_defconfig | 1 + 1 file changed, 1 insertion(+)
diff --git a/configs/xilinx_versal_virt_defconfig b/configs/xilinx_versal_virt_defconfig index a1feafc49b9f..0339130e8b85 100644 --- a/configs/xilinx_versal_virt_defconfig +++ b/configs/xilinx_versal_virt_defconfig @@ -5,6 +5,7 @@ CONFIG_SYS_INIT_SP_BSS_OFFSET=1572864 CONFIG_ARCH_VERSAL=y CONFIG_TEXT_BASE=0x8000000 CONFIG_SYS_MALLOC_F_LEN=0x100000 +CONFIG_NR_DRAM_BANKS=36 CONFIG_DEFAULT_DEVICE_TREE="xilinx-versal-virt" CONFIG_SYS_PROMPT="Versal> " CONFIG_OF_LIBFDT_OVERLAY=y
On 8/2/23 08:35, Michal Simek wrote:
From: Venkatesh Yadav Abbarapu venkatesh.abbarapu@amd.com
HBM stands for high bandwidth memory and is a type of memory interface used in 3D-stacked DRAM (dynamic random access memory) in some AMD GPUs (aka graphics cards), as well as the server, high-performance computing (HPC) and networking and client space. High Bandwidth Memory(HBM) has total 16 channels, one channel is divided into two pseudo channels which makes its 32 banks each with some amount of memory. And then we have DDR_LOW PS low, DDR_HIGH0 PS high, DDR_HIGH1 PS very high and pretty much there should be also place for PL DDR. So maximum number of memory banks will be 36, updating the CONFIG_NR_DRAM_BANKS to 36.
Signed-off-by: Venkatesh Yadav Abbarapu venkatesh.abbarapu@amd.com Signed-off-by: Michal Simek michal.simek@amd.com
configs/xilinx_versal_virt_defconfig | 1 + 1 file changed, 1 insertion(+)
diff --git a/configs/xilinx_versal_virt_defconfig b/configs/xilinx_versal_virt_defconfig index a1feafc49b9f..0339130e8b85 100644 --- a/configs/xilinx_versal_virt_defconfig +++ b/configs/xilinx_versal_virt_defconfig @@ -5,6 +5,7 @@ CONFIG_SYS_INIT_SP_BSS_OFFSET=1572864 CONFIG_ARCH_VERSAL=y CONFIG_TEXT_BASE=0x8000000 CONFIG_SYS_MALLOC_F_LEN=0x100000 +CONFIG_NR_DRAM_BANKS=36 CONFIG_DEFAULT_DEVICE_TREE="xilinx-versal-virt" CONFIG_SYS_PROMPT="Versal> " CONFIG_OF_LIBFDT_OVERLAY=y
Applied. M
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Michal Simek