From e7abbfc4e1aedd7e9f930a1302ccb4297fb07b23 Mon Sep 17 00:00:00 2001
From: Moritz Scherer <scheremo@iis.ee.ethz.ch>
Date: Fri, 23 Aug 2024 10:29:45 +0200
Subject: [PATCH] Bump from chimera/sw

---
 CMakeLists.txt                              |  3 +++
 targets/chimera-open/common.ldh             |  2 +-
 targets/chimera-open/include/soc_addr_map.h | 20 ++++++++++++++++++++
 targets/chimera-open/src/soc_ctrl.c         | 12 +++++++++++-
 4 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b36aecb..732452b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,9 @@ set(CMAKE_C_STANDARD 99)
 # SCHEREMO: Needed to skip compiler test, which doesn't support baremetal targets
 set(CMAKE_C_COMPILER_WORKS 1)
 
+# SCHEREMO: Help most IDE's LSPs find definitions
+set(CMAKE_EXPORT_COMPILE_COMMANDS 1)
+
 # SCHEREMO: This toolchain file is only used for test compilation!
 set(CMAKE_TOOLCHAIN_FILE cmake/toolchain_gcc.cmake)
 
diff --git a/targets/chimera-open/common.ldh b/targets/chimera-open/common.ldh
index 7c94fff..cb5d6f8 100644
--- a/targets/chimera-open/common.ldh
+++ b/targets/chimera-open/common.ldh
@@ -28,7 +28,7 @@ SECTIONS {
   /* Global and stack pointer */
   /* By default, keep the calling context (boot ROM) stack pointer */
   __global_pointer$ = ADDR(.misc) + SIZEOF(.misc) / 2;
-  __stack_pointer$  = 0;
+  __stack_pointer$  = ORIGIN(memisl) + LENGTH(memisl);
 
   /* Further addresses */
   __base_dma      = 0x01000000;
diff --git a/targets/chimera-open/include/soc_addr_map.h b/targets/chimera-open/include/soc_addr_map.h
index b748a0e..8141c6f 100644
--- a/targets/chimera-open/include/soc_addr_map.h
+++ b/targets/chimera-open/include/soc_addr_map.h
@@ -4,6 +4,11 @@
 //
 // Moritz Scherer <scheremo@iis.ee.ethz.ch>
 
+#ifndef _SOC_ADDR_MAP_INCLUDE_GUARD_
+#define _SOC_ADDR_MAP_INCLUDE_GUARD_
+
+#include <stdint.h>
+
 #define CLINT_CTRL_BASE 0x02040000
 
 #define SOC_CTRL_BASE 0x30001000
@@ -13,3 +18,18 @@
 #define CLUSTER_2_BASE 0x40400000
 #define CLUSTER_3_BASE 0x40600000
 #define CLUSTER_4_BASE 0x40800000
+
+#define CLUSTER_0_NUMCORES 9
+#define CLUSTER_1_NUMCORES 9
+#define CLUSTER_2_NUMCORES 9
+#define CLUSTER_3_NUMCORES 9
+#define CLUSTER_4_NUMCORES 9
+
+static uint8_t _chimera_numCores[] = {CLUSTER_0_NUMCORES, CLUSTER_1_NUMCORES, CLUSTER_2_NUMCORES,
+                                      CLUSTER_3_NUMCORES, CLUSTER_4_NUMCORES};
+#define _chimera_numClusters 5
+
+#define CHIMERA_PADFRAME_BASE_ADDRESS 0x30002000
+#define FLL_BASE_ADDR 0x30003000
+
+#endif
diff --git a/targets/chimera-open/src/soc_ctrl.c b/targets/chimera-open/src/soc_ctrl.c
index 45a8335..9190d1b 100644
--- a/targets/chimera-open/src/soc_ctrl.c
+++ b/targets/chimera-open/src/soc_ctrl.c
@@ -6,6 +6,7 @@
 
 #include "regs/soc_ctrl.h"
 #include "soc_addr_map.h"
+#include "soc_ctrl.h"
 #include <stdint.h>
 
 void setupInterruptHandler(void *handler) {
@@ -32,6 +33,12 @@ void waitClusterBusy(uint8_t clusterId) {
 
     while (*busy_ptr == 1) {
     }
+    // TODO: temporary race condition fix
+    for (int i = 0; i < 1000; i++) {
+        // NOP
+        asm volatile("addi x0, x0, 0\n" :::);
+    }
+
     return;
 }
 
@@ -43,7 +50,10 @@ void offloadToCluster(void *function, uint8_t clusterId) {
 
     *snitchBootAddr = function;
 
-    uint32_t hartId = clusterId * 9 + 1;
+    uint32_t hartId = 1;
+    for (uint32_t i = 0; i < clusterId; i++) {
+        hartId += _chimera_numCores[i];
+    }
 
     volatile uint32_t *interruptTarget = ((uint32_t *)CLINT_CTRL_BASE) + hartId;
     waitClusterBusy(clusterId);