Rename RISC-V_RV32_SiFive_HiFive1-FreedomStudio directory to RISC-V_RV32_SiFive_HiFive1-RevB-FreedomStudio as it targets Rev B of the hardware.

git-svn-id: http://svn.code.sf.net/p/freertos/code/trunk@2790 1d2547de-c912-0410-9cb9-b8ca96c0e9e2

1 files changed, 80 insertions, 0 deletions

diff --git a/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/src/timer.c b/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/src/timer.c
new file mode 100644
index 000000000..f58413321
--- /dev/null
+++ b/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/src/timer.c
@@ -0,0 +1,80 @@
+/* Copyright 2018 SiFive, Inc */
+/* SPDX-License-Identifier: Apache-2.0 */
+
+#include <sys/time.h>
+#include <sys/times.h>
+#include <metal/cpu.h>
+#include <metal/timer.h>
+#include <metal/machine.h>
+
+#if defined(__METAL_DT_MAX_HARTS)
+/* This implementation serves as a small shim that interfaces with the first
+ * timer on a system. */
+int metal_timer_get_cyclecount(int hartid, unsigned long long *mcc)
+{
+    struct metal_cpu *cpu = metal_cpu_get(hartid);
+
+    if ( cpu ) {
+        *mcc = metal_cpu_get_timer(cpu);
+        return 0;
+    }	
+    return -1;
+}
+
+int metal_timer_get_timebase_frequency(int hartid, unsigned long long *timebase)
+{
+    struct metal_cpu *cpu = metal_cpu_get(hartid);
+
+    if ( cpu ) {
+        *timebase = metal_cpu_get_timebase(cpu);
+        return 0;
+    } 
+    return -1;
+}
+
+int metal_timer_get_machine_time(int hartid)
+{
+    struct metal_cpu *cpu = metal_cpu_get(hartid);
+       
+    if ( cpu ) {
+       return metal_cpu_get_mtime(cpu);
+    }
+    return 0;
+}
+
+int metal_timer_set_machine_time(int hartid, unsigned long long time)
+{
+    struct metal_cpu *cpu = metal_cpu_get(hartid);
+
+    if ( cpu ) {
+       return metal_cpu_set_mtimecmp(cpu, time);
+    }
+    return -1;
+}
+
+#else
+
+/* This implementation of gettimeofday doesn't actually do anything, it's just there to
+ * provide a shim and return 0 so we can ensure that everything can link to _gettimeofday.
+ */
+int nop_cyclecount(int id, unsigned long long *c) __attribute__((section(".text.metal.nop.cyclecount")));
+int nop_cyclecount(int id, unsigned long long *c) { return -1; }
+int nop_timebase(unsigned long long *t) __attribute__((section(".text.metal.nop.timebase")));
+int nop_timebase(unsigned long long *t) { return -1; }
+int nop_tick(int second) __attribute__((section(".text.metal.nop.tick")));
+int nop_tick(int second) { return -1; }
+int metal_timer_get_cyclecount(int hartid, unsigned long long *c) __attribute__((weak, alias("nop_cyclecount")))
+{
+#pragma message("There is no default timer device, metal_timer_get_cyclecount() will always return cyclecount -1.")
+}
+int metal_timer_get_timebase_frequency(unsigned long long *t) __attribute__((weak, alias("nop_timebase")))
+{
+#pragma message("There is no default timer device, metal_timer_get_timebase_frequency() will always return timebase -1.")
+}
+int metal_timer_set_tick(int second) __attribute__((weak, alias("nop_tick")))
+{
+#pragma message("There is no default timer device, metal_timer_set_tick) will always return -1.")
+}
+
+#endif
+