From 402b04a84a4ff9c046a78da93bd1da81b686a070 Mon Sep 17 00:00:00 2001
From: Eric Lee <eric.lee@embedian.com>
Date: Thu, 3 Sep 2020 11:18:09 +0800
Subject: [PATCH] Add Cortex-M4 Support

---
 include/configs/smarcimx8mm.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/include/configs/smarcimx8mm.h b/include/configs/smarcimx8mm.h
index 25a4845..6e282e9 100644
--- a/include/configs/smarcimx8mm.h
+++ b/include/configs/smarcimx8mm.h
@@ -158,8 +158,12 @@
 	JAILHOUSE_ENV \
 	"script=boot.scr\0" \
 	"image=Image\0" \
+        "m4_bin=hello_world.bin\0" \
+        "use_m4=no\0" \
 	"console=ttymxc2,115200 earlycon=ec_imx6q,0x30890000,115200\0" \
 	"fdt_addr=0x43000000\0"			\
+        "m4_addr=0x7e0000\0" \
+        "m4_addr_tmp=0x48000000\0"      \
 	"fdt_high=0xffffffffffffffff\0"		\
 	"boot_fdt=try\0" \
 	"fdt_file=" CONFIG_DEFAULT_FDT_FILE "\0" \
@@ -185,9 +189,11 @@
 	"bootscript=echo Running bootscript from mmc ...; " \
 		"source\0" \
 	"loadimage=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${image}\0" \
+        "loadm4bin=load mmc ${mmcdev}:${mmcpart} ${m4_addr_tmp} ${m4_bin}\0" \
         "loadusbimage=fatload usb 0:1 ${loadaddr} ${image}\0" \
         "loadfdt=fatload mmc ${mmcdev}:${mmcpart} ${fdt_addr} /dtbs/${fdt_file}\0" \
 	"loadusbfdt=fatload usb 0:1 ${fdt_addr} /dtbs/${fdt_file}\0" \
+        "cpm4mem=cp.b ${m4_addr_tmp} ${m4_addr} 20000\0" \
 	"mmcboot=echo Booting from mmc ...; " \
 		"run mmcargs; " \
 		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
@@ -199,6 +205,14 @@
 		"else " \
 			"echo wait for boot; " \
 		"fi;\0" \
+        "m4boot=" \
+                "if test ${m4_addr} = 0x7e0000; then " \
+                        "echo Booting M4 from TCM; " \
+                "else " \
+                        "echo Booting M4 from DRAM; " \
+                        "dcache flush; " \
+                "fi; " \
+                "bootaux ${m4_addr};\0" \
         "usbboot=echo Booting from USB ...; " \
                 "run usbargs; " \
                 "if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
@@ -233,6 +247,10 @@
 
 #define CONFIG_BOOTCOMMAND \
            "mmc dev ${mmcdev}; if mmc rescan; then " \
+                   "if test ${use_m4} = yes && run loadm4bin; then " \
+                           "run cpm4mem; " \
+                           "run m4boot; " \
+                   "fi; " \
                 "echo Checking for: uEnv.txt ...; " \
                        "if test -e mmc ${bootpart} /uEnv.txt; then " \
                                 "if run loadbootenv; then " \
-- 
1.9.1