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-rw-r--r--bsps/arm/raspberrypi/start/bspgetworkarea.c34
-rw-r--r--bsps/arm/raspberrypi/start/bspstart.c93
-rw-r--r--bsps/arm/raspberrypi/start/linkcmds.in34
3 files changed, 135 insertions, 26 deletions
diff --git a/bsps/arm/raspberrypi/start/bspgetworkarea.c b/bsps/arm/raspberrypi/start/bspgetworkarea.c
index 4b2f440183..6521dcf352 100644
--- a/bsps/arm/raspberrypi/start/bspgetworkarea.c
+++ b/bsps/arm/raspberrypi/start/bspgetworkarea.c
@@ -47,12 +47,16 @@ extern char WorkAreaBase[];
void bsp_work_area_initialize(void)
{
- uintptr_t work_base = (uintptr_t) WorkAreaBase;
- uintptr_t ram_end;
- bcm2835_get_vc_memory_entries vc_entry;
+ uintptr_t work_base;
+ uintptr_t ram_end;
+ bcm2835_get_board_spec_entries spec = { 0 };
+
+ work_base = (uintptr_t) WorkAreaBase;
+
/*
- * bcm2835_get_arm_memory_entries arm_entry;
- * is another alternative how to obtain usable memory size
+ * Get the board revision and use it to determine the size of the
+ * SDRAM. Get the VC memory entry to determine the size of the VC
+ * memory needed.
*/
#ifdef USE_UBOOT
@@ -62,10 +66,22 @@ void bsp_work_area_initialize(void)
ram_end = (uintptr_t)RamBase + (uintptr_t)RamSize;
#endif
- memset( &vc_entry, 0, sizeof(vc_entry) );
- if (bcm2835_mailbox_get_vc_memory( &vc_entry ) >= 0) {
- if (vc_entry.base > 10 * 1024 *1024)
- ram_end = ram_end > vc_entry.base? vc_entry.base: ram_end;
+ if (bcm2835_mailbox_get_board_revision( &spec ) >= 0) {
+ uint32_t mem = (spec.spec >> (4 + 4 + 8 + 4)) & 0xf;
+ if (mem < 5) {
+ bcm2835_get_vc_memory_entries vc = { 0 };
+ const uint32_t rpi_mem[5] = {
+ 256 * 1024,
+ 512 * 1024,
+ 1 * 1024,
+ 2 * 1024,
+ 4 * 1024
+ };
+ ram_end = work_base + rpi_mem[mem];
+ if (bcm2835_mailbox_get_vc_memory( &vc ) >= 0)
+ ram_end -= vc.size;
+ }
}
+
bsp_work_area_initialize_default( (void *) work_base, ram_end - work_base );
}
diff --git a/bsps/arm/raspberrypi/start/bspstart.c b/bsps/arm/raspberrypi/start/bspstart.c
index c5786bfa4a..6ff286f840 100644
--- a/bsps/arm/raspberrypi/start/bspstart.c
+++ b/bsps/arm/raspberrypi/start/bspstart.c
@@ -22,8 +22,101 @@
#include <bsp/linker-symbols.h>
#include <bsp/stackalloc.h>
#include <bsp/raspberrypi.h>
+#include <bsp/vc.h>
+
+static const struct {
+ uint32_t code;
+ const char* label;
+} rpi_codes[] =
+{
+ { 0x900021, "A+ 1.1 (512MB)" },
+ { 0x900032, "B+ 1.2 (512MB)" },
+ { 0x900092, "Zero 1.2 (512MB)" },
+ { 0x900093, "Zero 1.3 (512MB)" },
+ { 0x9000c1, "Zero W 1.1 (512MB)" },
+ { 0x9020e0, "3A+ 1.0 (512MB)" },
+ { 0x920092, "Zero 1.2 (512MB)" },
+ { 0x920093, "Zero 1.3 (512MB)" },
+ { 0x900061, "CM 1.1 (512MB)" },
+ { 0xa01040, "2B 1.0 (1GB)" },
+ { 0xa01041, "2B 1.1 (1GB)" },
+ { 0xa02082, "3B 1.2 (1GB)" },
+ { 0xa020a0, "CM3 1.0 (1GB)" },
+ { 0xa020d3, "3B+ 1.3 (1GB)" },
+ { 0xa21041, "2B 1.1 (1GB)" },
+ { 0xa22042, "2B 1,2 (with BCM2837) (1GB)" },
+ { 0xa22082, "3B 1.2 (1GB)" },
+ { 0xa220a0, "CM3 1.0 (1GB)" },
+ { 0xa32082, "3B 1.2 (1GB)" },
+ { 0xa52082, "3B 1.2 (1GB)" },
+ { 0xa22083, "3B 1.3 (1GB)" },
+ { 0xa02100, "CM3+ 1.0 (1GB)" },
+ { 0xa03111, "4B 1.1 (1GB)" },
+ { 0xb03111, "4B 1.1 (2GB)" },
+ { 0xc03111, "4B 1.1 (4GB)" },
+};
+
+static const char* rpi_types[] = {
+ "A",
+ "B",
+ "A+",
+ "B+",
+ "2B",
+ "Alpha (early prototype)",
+ "CM1",
+ "3B",
+ "Zero",
+ "CM3",
+ "Zero W",
+ "3B+",
+ "3A+",
+ "Internal use only",
+ "CM3+",
+ "4B",
+};
+
+static const char* rpi_mem[] =
+{
+ "256MB",
+ "512MB",
+ "1GB",
+ "2GB",
+ "4GB"
+};
+
+#define NUMOF(_s) (sizeof(_s) / sizeof(_s[0]))
void bsp_start(void)
{
+ bcm2835_get_board_spec_entries spec = { 0 };
+
+ printk("\nRTEMS RPi ");
+ if (bcm2835_mailbox_get_board_revision( &spec ) >= 0) {
+ size_t i;
+ for (i = 0; i < NUMOF(rpi_codes); ++i) {
+ if (rpi_codes[i].code == spec.spec) {
+ printk("%s [%08x]", rpi_codes[i].label, spec.spec);
+ break;
+ }
+ }
+ if (i >= NUMOF(rpi_codes)) {
+ uint32_t type = (spec.spec >> 4) & 0xff;
+ uint32_t mem = (spec.spec >> (4 + 4 + 8 + 4)) & 0xf;
+ printk(" unknown code [%08x] ", spec.spec);
+ if (type < NUMOF(rpi_types))
+ printk(rpi_types[type]);
+ else
+ printk("type: %02x", type);
+ if (mem < NUMOF(rpi_mem))
+ printk(" %s", rpi_mem[mem]);
+ else
+ printk(" mem: %x", mem);
+ }
+ printk("\n");
+ }
+ else {
+ printk(": ERROR reading mailbox\n");
+ }
+
bsp_interrupt_initialize();
}
diff --git a/bsps/arm/raspberrypi/start/linkcmds.in b/bsps/arm/raspberrypi/start/linkcmds.in
index 7a1bcbac73..d99b4fe23e 100644
--- a/bsps/arm/raspberrypi/start/linkcmds.in
+++ b/bsps/arm/raspberrypi/start/linkcmds.in
@@ -15,27 +15,27 @@
*/
MEMORY {
- RAM_MMU (AIW) : ORIGIN = 0x00100000, LENGTH = 16k
- RAM (AIW) : ORIGIN = 0x00200000, LENGTH = 128M - 2M
+ RAM_MMU (AIW) : ORIGIN = 0x00100000, LENGTH = @RPI_RAM_MMU_LENGTH@
+ RAM (AIW) : ORIGIN = 0x00200000, LENGTH = @RPI_RAM_LENGTH_AVAILABLE@ - @RPI_RAM_NOCACHE_LENGTH@
}
-REGION_ALIAS ("REGION_START", RAM);
-REGION_ALIAS ("REGION_VECTOR", RAM);
-REGION_ALIAS ("REGION_TEXT", RAM);
-REGION_ALIAS ("REGION_TEXT_LOAD", RAM);
-REGION_ALIAS ("REGION_RODATA", RAM);
-REGION_ALIAS ("REGION_RODATA_LOAD", RAM);
-REGION_ALIAS ("REGION_DATA", RAM);
-REGION_ALIAS ("REGION_DATA_LOAD", RAM);
-REGION_ALIAS ("REGION_FAST_TEXT", RAM);
+REGION_ALIAS ("REGION_START", RAM);
+REGION_ALIAS ("REGION_VECTOR", RAM);
+REGION_ALIAS ("REGION_TEXT", RAM);
+REGION_ALIAS ("REGION_TEXT_LOAD", RAM);
+REGION_ALIAS ("REGION_RODATA", RAM);
+REGION_ALIAS ("REGION_RODATA_LOAD", RAM);
+REGION_ALIAS ("REGION_DATA", RAM);
+REGION_ALIAS ("REGION_DATA_LOAD", RAM);
+REGION_ALIAS ("REGION_FAST_TEXT", RAM);
REGION_ALIAS ("REGION_FAST_TEXT_LOAD", RAM);
-REGION_ALIAS ("REGION_FAST_DATA", RAM);
+REGION_ALIAS ("REGION_FAST_DATA", RAM);
REGION_ALIAS ("REGION_FAST_DATA_LOAD", RAM);
-REGION_ALIAS ("REGION_BSS", RAM);
-REGION_ALIAS ("REGION_WORK", RAM);
-REGION_ALIAS ("REGION_STACK", RAM);
-REGION_ALIAS ("REGION_NOCACHE", RAM);
-REGION_ALIAS ("REGION_NOCACHE_LOAD", RAM);
+REGION_ALIAS ("REGION_BSS", RAM);
+REGION_ALIAS ("REGION_WORK", RAM);
+REGION_ALIAS ("REGION_STACK", RAM);
+REGION_ALIAS ("REGION_NOCACHE", RAM);
+REGION_ALIAS ("REGION_NOCACHE_LOAD", RAM);
bsp_stack_abt_size = DEFINED (bsp_stack_abt_size) ? bsp_stack_abt_size : 1024;
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 07:18:38 +0000