[manuf,ast] do not copy all AST values to CSRs during SRAM load

All value will be copied to OTP and subsequently loaded into the CSRs by
the ROM.

Signed-off-by: Tim Trippel <[email protected]>

Author: timothytrippel

sw/device/silicon_creator/manuf/lib/ast_program.c

@@ -101,7 +101,10 @@ status_t ast_program_config(bool verbose) {
   // Program AST CSRs.
   LOG_INFO("Programming %u AST words",
            kFlashInfoAstCalibrationDataSizeIn32BitWords);
-  for (size_t i = 0; i < kFlashInfoAstCalibrationDataSizeIn32BitWords; ++i) {
+  // Don't write the last 3 words of AST config to CSRs on SRAM program boot;
+  // they will get copied to OTP later and written by the ROM on boot.
+  for (size_t i = 0; i < kFlashInfoAstCalibrationDataSizeIn32BitWords - 3;
+       ++i) {
     uint32_t addr = TOP_EARLGREY_AST_BASE_ADDR + i * sizeof(uint32_t);
     uint32_t data = ast_data[i];
     LOG_INFO("\tAddress = 0x%08x, Data = 0x%08x", addr, data);

sw/device/silicon_creator/manuf/lib/ast_program_functest.c

@@ -82,9 +82,9 @@ static status_t execute_test(void) {
   TRY(program_page());
   TRY(ast_program_config(true));
   uint32_t crc =
-      crc32(ast_cfg_data,
-            kFlashInfoAstCalibrationDataSizeIn32BitWords * sizeof(uint32_t));
-  TRY_CHECK(ast_nr_writes == 39);
+      crc32(ast_cfg_data, (kFlashInfoAstCalibrationDataSizeIn32BitWords - 3) *
+                              sizeof(uint32_t));
+  TRY_CHECK(ast_nr_writes == 36);
   TRY_CHECK(crc32_finish(&ast_crc) == crc);
   return OK_STATUS();
 }