Custom memory layout for Stax and Flex (44k ram compared to 30k for n…

…ano s plus)
LedgerHQ · May 27, 2024 · d82d610 · d82d610
1 parent d690db9
commit d82d610
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Showing 4 changed files with 16 additions and 5 deletions.
diff --git a/ledger_device_sdk/build.rs b/ledger_device_sdk/build.rs
@@ -34,7 +34,8 @@ fn main() -> Result<(), Box<dyn Error>> {
     let linkerscript = match device {
         NanoS => "nanos_layout.ld",
         NanoX => "nanox_layout.ld",
-        NanoSPlus | Stax | Flex => "nanosplus_layout.ld",
+        NanoSPlus => "nanosplus_layout.ld",
+        Stax | Flex => "stax_flex_layout.ld",
     };
     std::fs::copy(linkerscript, out_dir.join(linkerscript))?;
     std::fs::copy("link.ld", out_dir.join("link.ld"))?;

diff --git a/ledger_device_sdk/flex.json b/ledger_device_sdk/flex.json
@@ -13,11 +13,11 @@
   "panic-strategy": "abort",
   "pre-link-args": {
       "ld.lld": [
-          "-Tnanosplus_layout.ld",
+          "-Tstax_flex_layout.ld",
           "-Tlink.ld"
       ],
       "ld": [
-          "-Tnanosplus_layout.ld",
+          "-Tstax_flex_layout.ld",
           "-Tlink.ld"
       ]
   },

diff --git a/ledger_device_sdk/stax.json b/ledger_device_sdk/stax.json
@@ -13,11 +13,11 @@
   "panic-strategy": "abort",
   "pre-link-args": {
       "ld.lld": [
-          "-Tnanosplus_layout.ld",
+          "-Tstax_flex_layout.ld",
           "-Tlink.ld"
       ],
       "ld": [
-          "-Tnanosplus_layout.ld",
+          "-Tstax_flex_layout.ld",
           "-Tlink.ld"
       ]
   },

diff --git a/ledger_device_sdk/stax_flex_layout.ld b/ledger_device_sdk/stax_flex_layout.ld
@@ -0,0 +1,10 @@
+MEMORY
+{
+  FLASH   (rx)  : ORIGIN = 0xc0de0000, LENGTH = 400K
+  DATA    (r)   : ORIGIN = 0xc0de0000, LENGTH = 400K
+  SRAM    (rwx) : ORIGIN = 0xda7a0000, LENGTH = 44K
+}
+
+PAGE_SIZE  = 512;
+STACK_SIZE = 1500;
+END_STACK  = ORIGIN(SRAM) + LENGTH(SRAM);