Remove legacy examples

Signed-off-by: Nathaniel Graff <nathaniel.graff@sifive.com>

3 files changed, 0 insertions, 75 deletions

diff --git a/software/smp/Makefile b/software/smp/Makefile
deleted file mode 100644
index 4131ffc..0000000
--- a/software/smp/Makefile
+++ /dev/null
@@ -1,6 +0,0 @@
-TARGET = smp
-C_SRCS += smp.c
-CFLAGS += -O2 -fno-builtin-printf -DENABLE_SMP
-
-BSP_BASE = ../../bsp
-include $(BSP_BASE)/env/common.mk
diff --git a/software/smp/atomic.h b/software/smp/atomic.h
deleted file mode 100644
index 074c6a2..0000000
--- a/software/smp/atomic.h
+++ /dev/null
@@ -1,29 +0,0 @@
-#ifndef SIFIVE_ATOMIC_H
-#define SIFIVE_ATOMIC_H
-
-#define ATOMIC_INIT(x)		\
-	{			\
-		.counter = (x),	\
-	}
-
-typedef struct {
-  int counter;
-} atomic_t;
-
-static inline int atomic_xchg(atomic_t *v, int n)
-{
-  register int c;
-
-  __asm__ __volatile__ (
-    "amoswap.w.aqrl %0, %2, %1"
-    : "=r" (c), "+A" (v->counter)
-    : "r" (n));
-  return c;
-}
-
-static inline void mb(void)
-{
-  __asm__ __volatile__ ("fence");
-}
-
-#endif
diff --git a/software/smp/smp.c b/software/smp/smp.c
deleted file mode 100644
index 36c9db9..0000000
--- a/software/smp/smp.c
+++ /dev/null
@@ -1,40 +0,0 @@
-#include <stdio.h>
-#include <unistd.h>
-#include "atomic.h"
-void write_hex(int, unsigned long);
-
-atomic_t tty_lock = ATOMIC_INIT(0);
-
-void get_lock(atomic_t *lock)
-{
-  while (atomic_xchg(lock, 1) == 1);
-  mb();
-}
-
-void put_lock(atomic_t *lock)
-{
-  mb();
-  atomic_xchg(lock, 0);
-}
-
-int secondary_main(int hartid)
-{
-  volatile int counter;
-
-  while (1) {
-    get_lock(&tty_lock);
-    write(1, "hello world from hart ", 22);
-    char s[] = {'0', '\n', '\0'};
-    s[0] += hartid;
-    write(1, s, 2);
-    put_lock(&tty_lock);
-
-    for (counter = 0; counter < 10000 + 100*hartid; ++counter)
-        mb();
-  }
-}
-
-int main()
-{
-  return secondary_main(0);
-}