tests: device: pin symbols for testing with demand paging

There are quite a few symbols which are needed before the paging
mechanism is initialized. So they need to be pinned in memory
to prevent page fault early in the boot process.

Signed-off-by: Daniel Leung <[email protected]>

Author: dcpleung

tests/kernel/device/src/main.c

@@ -10,6 +10,7 @@
 #include <ztest.h>
 #include <sys/printk.h>
 #include <pm/device_runtime.h>
+#include <linker/sections.h>
 #include "abstract_driver.h"
 
 
@@ -130,14 +131,17 @@ static void test_null_dynamic_name(void)
 #endif
 }
 
+__pinned_bss
 static struct init_record {
 	bool pre_kernel;
 	bool is_in_isr;
 	bool is_pre_kernel;
 } init_records[4];
 
+__pinned_data
 static struct init_record *rp = init_records;
 
+__pinned_func
 static int add_init_record(bool pre_kernel)
 {
 	rp->pre_kernel = pre_kernel;
@@ -147,11 +151,13 @@ static int add_init_record(bool pre_kernel)
 	return 0;
 }
 
+__pinned_func
 static int pre1_fn(const struct device *dev)
 {
 	return add_init_record(true);
 }
 
+__pinned_func
 static int pre2_fn(const struct device *dev)
 {
 	return add_init_record(true);

tests/kernel/device/src/test_driver_init.c

@@ -8,6 +8,7 @@
 #include <device.h>
 #include <init.h>
 #include <ztest.h>
+#include <linker/sections.h>
 
 
 /**
@@ -36,10 +37,10 @@
 
 
 /* this is for storing sequence during initializtion */
-int init_level_sequence[4] = {0};
-int init_priority_sequence[4] = {0};
-unsigned int seq_level_cnt;
-unsigned int seq_priority_cnt;
+__pinned_bss int init_level_sequence[4] = {0};
+__pinned_bss int init_priority_sequence[4] = {0};
+__pinned_bss unsigned int seq_level_cnt;
+__pinned_bss unsigned int seq_priority_cnt;
 
 /* define driver type 1: for testing initialize levels and priorites */
 typedef int (*my_api_configure_t)(const struct device *dev, int dev_config);
@@ -58,6 +59,7 @@ static const struct my_driver_api funcs_my_drivers = {
 };
 
 /* driver init function of testing level */
+__pinned_func
 static int my_driver_lv_1_init(const struct device *dev)
 {
 	init_level_sequence[seq_level_cnt] = LEVEL_PRE_KERNEL_1;
@@ -66,6 +68,7 @@ static int my_driver_lv_1_init(const struct device *dev)
 	return 0;
 }
 
+__pinned_func
 static int my_driver_lv_2_init(const struct device *dev)
 {
 	init_level_sequence[seq_level_cnt] = LEVEL_PRE_KERNEL_2;