arm64: zynqmp: Provide a Kconfig option to use specified memory for MMU table

This patch provides a Kconfig option to use specified
memory for MMU table using reserve_mmu platform specific
routine. Here we used TCM space for MMU table.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/arch/arm/cpu/armv8/zynqmp/Kconfig b/arch/arm/cpu/armv8/zynqmp/Kconfig
index 5ffc9f6c867ba6a004c1c0509bbb494676b86aa7..4dc8b1caf79eabb5669b3a427ba2130272c2a050 100644 (file)
--- a/arch/arm/cpu/armv8/zynqmp/Kconfig
+++ b/arch/arm/cpu/armv8/zynqmp/Kconfig
@@ -42,6 +42,13 @@ config SYS_CONFIG_NAME
          Based on this option include/configs/<CONFIG_SYS_CONFIG_NAME>.h header
          will be used for board configuration.
 
+config SYS_MEM_RSVD_FOR_MMU
+       bool "Reserve memory for MMU Table"
+       help
+         If defined this option is used to setup different space for
+         MMU table than the one which will be allocated during
+         relocation.
+
 config BOOT_INIT_FILE
        string "boot.bin init register filename"
        depends on SPL

diff --git a/arch/arm/cpu/armv8/zynqmp/cpu.c b/arch/arm/cpu/armv8/zynqmp/cpu.c
index 9b83e51885fa0681b9334358880db3fe12df61cd..f026cb4511f02f738cc28561ac38b0fc16ff554c 100644 (file)
--- a/arch/arm/cpu/armv8/zynqmp/cpu.c
+++ b/arch/arm/cpu/armv8/zynqmp/cpu.c
@@ -77,6 +77,18 @@ u64 get_page_table_size(void)
        return 0x14000;
 }
 
+#ifdef CONFIG_SYS_MEM_RSVD_FOR_MMU
+int reserve_mmu(void)
+{
+       initialize_tcm(TCM_LOCK);
+       memset((void *)ZYNQMP_TCM_BASE_ADDR, 0, ZYNQMP_TCM_SIZE);
+       gd->arch.tlb_size = PGTABLE_SIZE;
+       gd->arch.tlb_addr = ZYNQMP_TCM_BASE_ADDR;
+
+       return 0;
+}
+#endif
+
 static unsigned int zynqmp_get_silicon_version_secure(void)
 {
        u32 ver;

diff --git a/arch/arm/include/asm/arch-zynqmp/hardware.h b/arch/arm/include/asm/arch-zynqmp/hardware.h
index cab29ba036911ab9d56fd49756fdb99d14777e7d..5f2c98d633e39a90babaf84d7361e2f373542a06 100644 (file)
--- a/arch/arm/include/asm/arch-zynqmp/hardware.h
+++ b/arch/arm/include/asm/arch-zynqmp/hardware.h
@@ -21,6 +21,9 @@
 #define ZYNQMP_USB0_XHCI_BASEADDR      0xFE200000
 #define ZYNQMP_USB1_XHCI_BASEADDR      0xFE300000
 
+#define ZYNQMP_TCM_BASE_ADDR   0xFFE00000
+#define ZYNQMP_TCM_SIZE                0x40000
+
 #define ZYNQMP_CRL_APB_BASEADDR        0xFF5E0000
 #define ZYNQMP_CRL_APB_TIMESTAMP_REF_CTRL_CLKACT       0x1000000
 #define ZYNQMP_CRL_APB_BOOT_PIN_CTRL_OUT_EN_SHIFT      0