configs: am64x_evm_*_defconfig: Rearrange the components in SRAM to satisfy...

configs: am64x_evm_*_defconfig: Rearrange the components in SRAM to satisfy the limitations for USB DFU boot mode

For USB DFU boot mode there is a limitation on the load address of boot
images that they have to be less than 0x70001000. Therefore, move the
SPL_TEXT_BASE address to 0x70000000.

Currently ATF is being loaded at 0x70000000, if the SPL is being loaded at
0x70000000 then ATF would overwrite SPL image when loaded. Therefore, move
the location of ATF to a latter location in SRAM, past the SPL image. Also
rearrange the EEPROM and BSS data on top of ATF.

Given below is the placement of various data sections in SRAM

     ┌──────────────────────────────────────┐0x70000000
     │                                      │
     │                                      │
     │                                      │
     │    SPL IMAGE (Max size 1.5 MB)       │
     │                                      │
     │                                      │
     │                                      │
     ├──────────────────────────────────────┤0x7017FFFF
     │                                      │
     │           SPL STACK                  │
     │                                      │
     ├──────────────────────────────────────┤0x70192727
     │          GLOBAL DATA(216 B)          │
     ├──────────────────────────────────────┤0x701927FF
     │                                      │
     │       INITIAL HEAP (32 KB)           │
     │                                      │
     ├──────────────────────────────────────┤0x7019A7FF
     │                                      │
     │          BSS  (20 KB)                │
     ├──────────────────────────────────────┤0x7019F7FF
     │         EEPROM DATA (2 KB)           │
     ├──────────────────────────────────────┤0x7019FFFF
     │                                      │
     │                                      │
     │            ATF (123 KB)              │
     │                                      │
     │                                      │
     ├──────────────────────────────────────┤0x701BEBFB
     │   BOOT PARAMETER INDEX TABLE (5124 B)│
     ├──────────────────────────────────────┤0x701BFFFF
     │                                      │
     │SYSFW FIREWALLED DUE TO A BUG (128 KB)│
     │                                      │
     ├──────────────────────────────────────┤0x701DFFFF
     │                                      │
     │      DMSC CODE AREA (128 KB)         │
     │                                      │
     └──────────────────────────────────────┘0x701FFFFF
Signed-off-by: NAswath Govindraju <a-govindraju@ti.com>
Signed-off-by: NLokesh Vutla <lokeshvutla@ti.com>
Link: https://lore.kernel.org/r/20210604163043.12811-9-a-govindraju@ti.com

arch/arm/mach-k3/include/mach/am64_hardware.h

@@ -7,8 +7,6 @@
 #ifndef __ASM_ARCH_AM64_HARDWARE_H
 #define __ASM_ARCH_AM64_HARDWARE_H
 
-#include <config.h>
-
 #define CTRL_MMR0_BASE					0x43000000
 #define CTRLMMR_MAIN_DEVSTAT				(CTRL_MMR0_BASE + 0x30)
 
@@ -54,7 +52,7 @@
 
 #define ROM_ENTENDED_BOOT_DATA_INFO			0x701beb00
 
-/* Use Last 1K as Scratch pad */
-#define TI_SRAM_SCRATCH_BOARD_EEPROM_START		0x701bfc00
+/* Use Last 2K as Scratch pad */
+#define TI_SRAM_SCRATCH_BOARD_EEPROM_START		0x7019f800
 
 #endif /* __ASM_ARCH_DRA8_HARDWARE_H */

configs/am64x_evm_a53_defconfig

@@ -5,6 +5,7 @@ CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_SYS_MALLOC_F_LEN=0x8000
 CONFIG_NR_DRAM_BANKS=2
 CONFIG_SOC_K3_AM642=y
+CONFIG_K3_ATF_LOAD_ADDR=0x701a0000
 CONFIG_TARGET_AM642_A53_EVM=y
 CONFIG_ENV_SIZE=0x20000
 CONFIG_SYS_SPI_U_BOOT_OFFS=0x280000

configs/am64x_evm_r5_defconfig

@@ -10,7 +10,7 @@ CONFIG_ENV_SIZE=0x20000
 CONFIG_SYS_SPI_U_BOOT_OFFS=0x80000
 CONFIG_DM_GPIO=y
 CONFIG_SPL_DM_SPI=y
-CONFIG_SPL_TEXT_BASE=0x70020000
+CONFIG_SPL_TEXT_BASE=0x70000000
 CONFIG_SPL_MMC_SUPPORT=y
 CONFIG_SPL_SERIAL_SUPPORT=y
 CONFIG_SPL_DRIVERS_MISC_SUPPORT=y

include/configs/am64x_evm.h

@@ -12,6 +12,7 @@
 #include <linux/sizes.h>
 #include <config_distro_bootcmd.h>
 #include <environment/ti/mmc.h>
+#include <asm/arch/am64_hardware.h>
 
 /* DDR Configuration */
 #define CONFIG_SYS_SDRAM_BASE1		0x880000000
@@ -43,7 +44,7 @@
  * location filled in by the boot ROM that we want to read out without any
  * interference from the C context.
  */
-#define CONFIG_SPL_BSS_START_ADDR	(CONFIG_SYS_K3_BOOT_PARAM_TABLE_INDEX -\
+#define CONFIG_SPL_BSS_START_ADDR	(TI_SRAM_SCRATCH_BOARD_EEPROM_START -\
 					 CONFIG_SPL_BSS_MAX_SIZE)
 /* Set the stack right below the SPL BSS section */
 #define CONFIG_SYS_INIT_SP_ADDR         CONFIG_SPL_BSS_START_ADDR