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[v3,18/36] mach-snapdragon: dynamic load addresses

Message ID 20240130-b4-qcom-common-target-v3-18-e523cbf9e556@linaro.org
State Superseded
Headers show
Series Qualcomm generic board support | expand

Commit Message

Caleb Connolly Jan. 30, 2024, 2:05 p.m. UTC 
Heavily inspired by Apple board code. Use the LMB allocator to configure
load addresses at runtime, and implement a lookup table for selecting a
devicetree.

As some Qualcomm RBx boards have different RAM capacities and base
addresses, it isn't possible to hardcode these regions.

Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
---
 arch/arm/Kconfig                                 |  1 +
 arch/arm/mach-snapdragon/board.c                 | 34 ++++++++++++++++++++++++
 board/qualcomm/dragonboard410c/dragonboard410c.c |  2 +-
 3 files changed, 36 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 03ea75cefc0d..c7a07c648fc0 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1085,6 +1085,7 @@  config ARCH_SNAPDRAGON
 	select OF_SEPARATE
 	select SMEM
 	select SPMI
+	select BOARD_LATE_INIT
 	select OF_BOARD
 	select SAVE_PREV_BL_FDT_ADDR
 	select LINUX_KERNEL_IMAGE_HEADER
diff --git a/arch/arm/mach-snapdragon/board.c b/arch/arm/mach-snapdragon/board.c
index 3018cc462b8f..3f51c4ab42d6 100644
--- a/arch/arm/mach-snapdragon/board.c
+++ b/arch/arm/mach-snapdragon/board.c
@@ -23,6 +23,7 @@ 
 #include <linux/bug.h>
 #include <linux/psci.h>
 #include <linux/sizes.h>
+#include <lmb.h>
 #include <malloc.h>
 #include <usb.h>
 
@@ -160,6 +161,39 @@  int board_init(void)
 	return 0;
 }
 
+void __weak qcom_late_init(void)
+{
+}
+
+#define KERNEL_COMP_SIZE	SZ_64M
+
+#define addr_alloc(lmb, size) lmb_alloc(lmb, size, SZ_2M)
+
+/* Stolen from arch/arm/mach-apple/board.c */
+int board_late_init(void)
+{
+	struct lmb lmb;
+	u32 status = 0;
+
+	lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
+
+	/* We need to be fairly conservative here as we support boards with just 1G of TOTAL RAM */
+	status |= env_set_hex("kernel_addr_r", addr_alloc(&lmb, SZ_128M));
+	status |= env_set_hex("ramdisk_addr_r", addr_alloc(&lmb, SZ_128M));
+	status |= env_set_hex("kernel_comp_addr_r", addr_alloc(&lmb, KERNEL_COMP_SIZE));
+	status |= env_set_hex("kernel_comp_size", KERNEL_COMP_SIZE);
+	status |= env_set_hex("scriptaddr", addr_alloc(&lmb, SZ_4M));
+	status |= env_set_hex("pxefile_addr_r", addr_alloc(&lmb, SZ_4M));
+	status |= env_set_hex("fdt_addr_r", addr_alloc(&lmb, SZ_2M));
+
+	if (status)
+		log_warning("%s: Failed to set run time variables\n", __func__);
+
+	qcom_late_init();
+
+	return 0;
+}
+
 static void build_mem_map(void)
 {
 	int i;
diff --git a/board/qualcomm/dragonboard410c/dragonboard410c.c b/board/qualcomm/dragonboard410c/dragonboard410c.c
index 0136cc2237de..fbbfc0e65e24 100644
--- a/board/qualcomm/dragonboard410c/dragonboard410c.c
+++ b/board/qualcomm/dragonboard410c/dragonboard410c.c
@@ -88,7 +88,7 @@  int misc_init_r(void)
 	return 0;
 }
 
-int board_late_init(void)
+int qcom_late_init(void)
 {
 	char serial[16];