Pass screen status and mmc struct from stage1 to 2

fusee/fusee-primary/src/lib/fatfs/diskio.c

@@ -15,15 +15,8 @@
 
 static bool g_ahb_redirect_enabled = false;
 
-// Only use voltage switching in stage2 and later.
-#ifdef FUSEE_STAGE1_SRC
-#define MMC_VOLTAGE_SWITCHING_ALLOWED false
-#else
-#define MMC_VOLTAGE_SWITCHING_ALLOWED true
-#endif
-
 /* Global sd struct. */
-static struct mmc g_sd_mmc = {0};
+struct mmc g_sd_mmc = {0};
 static bool g_sd_initialized = false;
 
 int initialize_sd_mmc(void) {
@@ -33,7 +26,7 @@ int initialize_sd_mmc(void) {
 	}
 
 	if (!g_sd_initialized) {
-		int rc = sdmmc_init(&g_sd_mmc, SWITCH_MICROSD, MMC_VOLTAGE_SWITCHING_ALLOWED);
+		int rc = sdmmc_init(&g_sd_mmc, SWITCH_MICROSD, false);
 		if (rc == 0) {
 			g_sd_initialized = true;
 			return 0;

fusee/fusee-primary/src/main.c

@@ -108,7 +108,9 @@ int main(void) {
     const char *stage2_path;
     stage2_args_t *stage2_args;
     uint32_t stage2_version = 0;
+    extern struct mmc g_sd_mmc;
 
+    sdmmc_set_loglevel(2);
     /* Initialize the display, console, etc. */
     setup_env();
 
@@ -134,6 +136,8 @@ int main(void) {
     strcpy(g_chainloader_arg_data, stage2_path);
     stage2_args = (stage2_args_t *)(g_chainloader_arg_data + strlen(stage2_path) + 1); /* May be unaligned. */
     memcpy(&stage2_args->version, &stage2_version, 4);
+    stage2_args->display_initialized = false;
+    memcpy(&stage2_args->sd_mmc, &g_sd_mmc, sizeof(g_sd_mmc));
     strcpy(stage2_args->bct0, bct0);
     g_chainloader_argc = 2;
 

fusee/fusee-primary/src/sdmmc.c

@@ -3382,8 +3382,8 @@ static int sdmmc_initialize_defaults(struct mmc *mmc)
  * @param controler The controller description to be used; usually SWITCH_EMMC
  *      or SWITCH_MICROSD.
  * @param allow_voltage_switching True if we should allow voltage switching,
- *      which may not make sense if we're about to chainload to another component,
+ *      which may not make sense if we're about to chainload to another component without
- *      a la fusee stage1.
+ *      preseving the overall structure.
  */
 int sdmmc_init(struct mmc *mmc, enum sdmmc_controller controller, bool allow_voltage_switching)
 {
@@ -3445,6 +3445,29 @@ int sdmmc_init(struct mmc *mmc, enum sdmmc_controller controller, bool allow_vol
 }
 
 
+/**
+ * Imports a SDMMC driver struct from another program. This mainly intended for stage2,
+ * so that it can reuse stage1's SDMMC struct instance(s).
+ *
+ * @param mmc The SDMMC structure to be imported.
+ */
+int sdmmc_import_struct(struct mmc *mmc)
+{
+    int rc;
+    bool uses_block_addressing = mmc->uses_block_addressing;
+    mmc->regs = sdmmc_get_regs(mmc->controller);
+
+    rc = sdmmc_initialize_defaults(mmc);
+    if (rc) {
+        printk("ERROR: controller SDMMC%d not currently supported!\n", mmc->controller + 1);
+        return rc;
+    }
+
+    mmc->uses_block_addressing = uses_block_addressing;
+    return 0;
+}
+
+
 /**
  * Selects the active MMC partition. Can be used to select
  * boot partitions for access. Affects all operations going forward.

fusee/fusee-primary/src/sdmmc.h

@@ -234,12 +234,21 @@ int sdmmc_set_loglevel(int loglevel);
  * @param controler The controller description to be used; usually SWITCH_EMMC
  *      or SWITCH_MICROSD.
  * @param allow_voltage_switching True if we should allow voltage switching,
- *      which may not make sense if we're about to chainload to another component,
+ *      which may not make sense if we're about to chainload to another component without
- *      a la fusee stage1.
+ *      preseving the overall structure.
  */
 int sdmmc_init(struct mmc *mmc, enum sdmmc_controller controller, bool allow_voltage_switching);
 
 
+/**
+ * Imports a SDMMC driver struct from another program. This mainly intended for stage2,
+ * so that it can reuse stage1's SDMMC struct instance(s).
+ *
+ * @param mmc The SDMMC structure to be imported.
+ */
+int sdmmc_import_struct(struct mmc *mmc);
+
+
 /**
  * Selects the active MMC partition. Can be used to select
  * boot partitions for access. Affects all operations going forward.

fusee/fusee-primary/src/stage2.h

@@ -2,6 +2,7 @@
 #define FUSEE_STAGE2_H
 
 #include "utils.h"
+#include "sdmmc.h"
 
 /* TODO: Is there a more concise way to do this? */
 #define STAGE2_ARGV_PROGRAM_PATH 0
@@ -11,7 +12,7 @@
 #define STAGE2_NAME_KEY "stage2_path"
 #define STAGE2_ADDRESS_KEY "stage2_addr"
 #define STAGE2_ENTRYPOINT_KEY "stage2_entrypoint"
-#define BCTO_MAX_SIZE 0x6000
+#define BCTO_MAX_SIZE 0x5800
 
 typedef struct {
     char path[0x100];
@@ -21,6 +22,8 @@ typedef struct {
 
 typedef struct {
     uint32_t version;
+    struct mmc sd_mmc;
+    bool display_initialized;
     char bct0[BCTO_MAX_SIZE];
 } stage2_args_t;
 

fusee/fusee-secondary/src/console.c

@@ -87,15 +87,19 @@ static ssize_t decode_utf8(uint32_t *out, const uint8_t *in) {
 }
 
 static void console_init_display(void) {
-    /* Initialize the display. */
+    if (!g_display_initialized) {
-    display_init();
+        /* Initialize the display. */
+        display_init();
+    }
 
     /* Set the framebuffer. */
     display_init_framebuffer(g_framebuffer);
 
     /* Turn on the backlight after initializing the lfb */
     /* to avoid flickering. */
-    display_enable_backlight(true);
+    if (!g_display_initialized) {
+        display_enable_backlight(true);
+    }
 
     g_display_initialized = true;
 }
@@ -140,7 +144,10 @@ static int console_create(void) {
     return 0;
 }
 
-int console_init(void) {
+
+int console_init(bool display_initialized) {
+    g_display_initialized = display_initialized;
+
     if (console_create() == -1) {
         return -1;
     }

fusee/fusee-secondary/src/console.h

@@ -1,7 +1,7 @@
 #ifndef FUSEE_CONSOLE_H
 #define FUSEE_CONSOLE_H
 
-int console_init(void);
+int console_init(bool display_initialized);
 void *console_get_framebuffer(bool enable_display);
 int console_display(const void *framebuffer); /* Must be page-aligned */
 int console_resume(void);

fusee/fusee-secondary/src/main.c

@@ -23,14 +23,14 @@ static bool g_do_nxboot;
 
 static void setup_env(void) {
     /* Set the console up. */
-    if (console_init() == -1) {
+    if (console_init(g_stage2_args->display_initialized) == -1) {
         generic_panic();
     }
 
     /* Set up exception handlers. */
     setup_exception_handlers();
 
-    if(switchfs_mount_all() == -1) {
+    if(switchfs_import_mmc_structs(&g_stage2_args->sd_mmc, NULL) == -1 || switchfs_mount_all() == -1) {
         fatal_error("Failed to mount at least one parition: %s\n", strerror(errno));
     }
 

fusee/fusee-secondary/src/sdmmc.c

@@ -3382,8 +3382,8 @@ static int sdmmc_initialize_defaults(struct mmc *mmc)
  * @param controler The controller description to be used; usually SWITCH_EMMC
  *      or SWITCH_MICROSD.
  * @param allow_voltage_switching True if we should allow voltage switching,
- *      which may not make sense if we're about to chainload to another component,
+ *      which may not make sense if we're about to chainload to another component without
- *      a la fusee stage1.
+ *      preseving the overall structure.
  */
 int sdmmc_init(struct mmc *mmc, enum sdmmc_controller controller, bool allow_voltage_switching)
 {
@@ -3445,6 +3445,29 @@ int sdmmc_init(struct mmc *mmc, enum sdmmc_controller controller, bool allow_vol
 }
 
 
+/**
+ * Imports a SDMMC driver struct from another program. This mainly intended for stage2,
+ * so that it can reuse stage1's SDMMC struct instance(s).
+ *
+ * @param mmc The SDMMC structure to be imported.
+ */
+int sdmmc_import_struct(struct mmc *mmc)
+{
+    int rc;
+    bool uses_block_addressing = mmc->uses_block_addressing;
+    mmc->regs = sdmmc_get_regs(mmc->controller);
+
+    rc = sdmmc_initialize_defaults(mmc);
+    if (rc) {
+        printk("ERROR: controller SDMMC%d not currently supported!\n", mmc->controller + 1);
+        return rc;
+    }
+
+    mmc->uses_block_addressing = uses_block_addressing;
+    return 0;
+}
+
+
 /**
  * Selects the active MMC partition. Can be used to select
  * boot partitions for access. Affects all operations going forward.

fusee/fusee-secondary/src/sdmmc.h

@@ -234,12 +234,21 @@ int sdmmc_set_loglevel(int loglevel);
  * @param controler The controller description to be used; usually SWITCH_EMMC
  *      or SWITCH_MICROSD.
  * @param allow_voltage_switching True if we should allow voltage switching,
- *      which may not make sense if we're about to chainload to another component,
+ *      which may not make sense if we're about to chainload to another component without
- *      a la fusee stage1.
+ *      preseving the overall structure.
  */
 int sdmmc_init(struct mmc *mmc, enum sdmmc_controller controller, bool allow_voltage_switching);
 
 
+/**
+ * Imports a SDMMC driver struct from another program. This mainly intended for stage2,
+ * so that it can reuse stage1's SDMMC struct instance(s).
+ *
+ * @param mmc The SDMMC structure to be imported.
+ */
+int sdmmc_import_struct(struct mmc *mmc);
+
+
 /**
  * Selects the active MMC partition. Can be used to select
  * boot partitions for access. Affects all operations going forward.

fusee/fusee-secondary/src/stage2.h

@@ -2,16 +2,19 @@
 #define FUSEE_STAGE2_H
 
 #include "utils.h"
+#include "sdmmc.h"
 
 /* TODO: Is there a more concise way to do this? */
 #define STAGE2_ARGV_PROGRAM_PATH 0
 #define STAGE2_ARGV_ARGUMENT_STRUCT 1
 #define STAGE2_ARGC 2
 
-#define BCTO_MAX_SIZE 0x6000
+#define BCTO_MAX_SIZE 0x5800
 
 typedef struct {
     uint32_t version;
+    struct mmc sd_mmc;
+    bool display_initialized;
     char bct0[BCTO_MAX_SIZE];
 } stage2_args_t;
 

fusee/fusee-secondary/src/switch_fs.c

@@ -12,6 +12,9 @@ static bool g_ahb_redirect_enabled = false;
 static bool g_sd_mmc_initialized = false;
 static bool g_nand_mmc_initialized = false;
 
+static bool g_sd_mmc_imported = false;
+static bool g_nand_mmc_imported = false;
+
 static struct mmc g_sd_mmc = {0};
 static struct mmc g_nand_mmc = {0};
 
@@ -43,7 +46,7 @@ static int mmc_partition_initialize(device_partition_t *devpart) {
 
     if (mmcpart->mmc == &g_sd_mmc) {
         if (!g_sd_mmc_initialized) {
-            int rc = sdmmc_init(mmcpart->mmc, mmcpart->controller, true);
+            int rc = g_sd_mmc_imported ? 0 : sdmmc_init(mmcpart->mmc, mmcpart->controller, true);
             if (rc == 0) {
                 sdmmc_set_write_enable(mmcpart->mmc, SDMMC_WRITE_ENABLED);
                 g_sd_mmc_initialized = true;
@@ -56,7 +59,7 @@ static int mmc_partition_initialize(device_partition_t *devpart) {
         return 0;
     } else if (mmcpart->mmc == &g_nand_mmc) {
         if (!g_nand_mmc_initialized) {
-            int rc = sdmmc_init(mmcpart->mmc, mmcpart->controller, true);
+            int rc = g_nand_mmc_imported ? 0 : sdmmc_init(mmcpart->mmc, mmcpart->controller, true);
             if (rc == 0) {
                 g_nand_mmc_initialized = true;
             } else {
@@ -235,6 +238,36 @@ static int switchfs_mount_partition_gpt_callback(const efi_entry_t *entry, void
     return 0;
 }
 
+int switchfs_import_mmc_structs(void *sd, void *nand) {
+    if (sd != NULL) {
+        int rc = 0;
+        memcpy(&g_sd_mmc, sd, sizeof(g_sd_mmc));
+        rc = sdmmc_import_struct(&g_sd_mmc);
+        if (rc != 0) {
+            memset(&g_sd_mmc, 0, sizeof(g_sd_mmc));
+            errno = rc;
+            return -1;
+        } else {
+            g_sd_mmc_imported = true;
+        }
+    }
+
+    if (nand != NULL) {
+        int rc = 0;
+        memcpy(&g_nand_mmc, nand, sizeof(g_nand_mmc));
+        rc = sdmmc_import_struct(&g_nand_mmc);
+        if (rc != 0) {
+            memset(&g_nand_mmc, 0, sizeof(g_nand_mmc));
+            errno = rc;
+            return -1;
+        } else {
+            g_nand_mmc_imported = true;
+        }
+    }
+
+    return 0;
+}
+
 int switchfs_mount_all(void) {
     device_partition_t model;
     int rc;

fusee/fusee-secondary/src/switch_fs.h

@@ -4,6 +4,8 @@
 #include "fs_dev.h"
 #include "raw_dev.h"
 
+int switchfs_import_mmc_structs(void *sd, void *nand);
+
 int switchfs_mount_all(void);
 int switchfs_unmount_all(void);