sw: Add .wide_spm section

pulp-platform · Jan 16, 2024 · 29645e2 · 29645e2
1 parent eb6642d
commit 29645e2
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Showing 3 changed files with 20 additions and 0 deletions.
diff --git a/target/sim/sw/host/runtime/host.c b/target/sim/sw/host/runtime/host.c
@@ -90,6 +90,16 @@ void initialize_bss() {
                            bss_size);
 }
 
+void initialize_wide_spm() {
+    extern volatile uint64_t __wide_spm_start, __wide_spm_end;
+
+    size_t wide_spm_size =
+        (size_t)(&__wide_spm_end) - (size_t)(&__wide_spm_start);
+    if (wide_spm_size)
+        sys_dma_blk_memcpy(SPM_WIDE_BASE_ADDR, (uint64_t)(&__wide_spm_start),
+                           wide_spm_size);
+}
+
 void enable_fpu() {
     uint64_t mstatus;
 

diff --git a/target/sim/sw/host/runtime/host.ld b/target/sim/sw/host/runtime/host.ld
@@ -41,6 +41,15 @@ SECTIONS
     __bss_end = . ;
   } > DRAM
 
+  .wide_spm :
+  {
+    . = ALIGN(8);
+    __wide_spm_start = . ;
+    *(.wide_spm)
+    . = ALIGN(8);
+    __wide_spm_end = . ;
+  } > DRAM
+
   __end = .;
 
   .devicebin : { *(.devicebin) } > DRAM

diff --git a/target/sim/sw/host/runtime/start.S b/target/sim/sw/host/runtime/start.S
@@ -43,6 +43,7 @@ _start:
     la      gp, __global_pointer$
     .option pop
     call initialize_bss
+    call initialize_wide_spm
     call enable_fpu
     call main