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authorleleraffa97@hotmail.it <leleraffa97@hotmail.it>2017-06-19 15:06:25 +0200
committerleleraffa97@hotmail.it <leleraffa97@hotmail.it>2017-06-19 15:06:25 +0200
commitacee9e74f6bd183b284af028b1f08aab666df9be (patch)
tree02d8df6267dd75dd92760ab9b8e924f4f4b8b400 /sw/z80
parentMerge branch 'master' of github.com:NaoPross/z80uPC into atlas (diff)
downloadz80uPC-acee9e74f6bd183b284af028b1f08aab666df9be.tar.gz
z80uPC-acee9e74f6bd183b284af028b1f08aab666df9be.zip
libc memset, memcmpHEADmaster
boot improved program allocation
Diffstat (limited to 'sw/z80')
-rw-r--r--sw/z80/kernel/boot_loader.c25
-rw-r--r--sw/z80/kernel/include/progman.h1
-rw-r--r--sw/z80/kernel/programs.c29
-rw-r--r--sw/z80/libc/include/string.h4
-rw-r--r--sw/z80/libc/string.c26
5 files changed, 61 insertions, 24 deletions
diff --git a/sw/z80/kernel/boot_loader.c b/sw/z80/kernel/boot_loader.c
index ddca4f9..03a52b5 100644
--- a/sw/z80/kernel/boot_loader.c
+++ b/sw/z80/kernel/boot_loader.c
@@ -1,5 +1,6 @@
#include "boot.h"
#include "progman.h"
+#include "string.h"
#define DEFAULT_EXEC_STATUS 0x4000
@@ -14,30 +15,10 @@ void boot_init() {
int8_t authenticate(const char *pwd) {
- const char *c_pwd = PWD_ADDR, *c_req = pwd;
-
- for (uint8_t i = 0; i < PWD_SIZE; i++) {
-
- if (*c_pwd != *c_req)
- return 0;
-
- c_pwd++;
- c_req++;
- }
-
- return 1;
+ return !memcmp(PWD_ADDR, pwd, PWD_SIZE);
}
void set_pwd(const char *pwd) {
- char *c_pwd = PWD_ADDR;
- const char *c_req = pwd;
-
- for (uint8_t i = 0; i < PWD_SIZE; i++) {
-
- *c_pwd = *c_req;
-
- c_pwd++;
- c_req++;
- }
+ memcpy(PWD_ADDR, pwd, PWD_SIZE);
} \ No newline at end of file
diff --git a/sw/z80/kernel/include/progman.h b/sw/z80/kernel/include/progman.h
index 0f56bb3..5d01f1c 100644
--- a/sw/z80/kernel/include/progman.h
+++ b/sw/z80/kernel/include/progman.h
@@ -51,7 +51,6 @@ struct program_base {
size_t inst_size; // size of the instructions set
void * bss_data; // pointer to the bss/data space
size_t data_size; // size of the bss/data space
- size_t stack_size; // size of the stack to determine the stack limit
};
void prog_alloc(int8_t id, struct program_info *info, const struct program_base *base);
diff --git a/sw/z80/kernel/programs.c b/sw/z80/kernel/programs.c
index 0f75887..705ea96 100644
--- a/sw/z80/kernel/programs.c
+++ b/sw/z80/kernel/programs.c
@@ -1,4 +1,5 @@
#include "progman.h"
+#include "string.h"
#define EMPTY_PROG_INFO 0x0
@@ -37,9 +38,35 @@ int8_t prog_req(struct program_info *info) {
void prog_alloc(int8_t id, struct program_info *info, const struct program_base *base) {
- // TODO, implements program allocation
+ void *addr = (id ? PROG_1_PREFIX : PROG_0_PREFIX) + PROG_VSTART;
+
+ if (info->enabled) {
+
+ if (id)
+ prog_1_fquit(); // force quit operation
+ else
+ prog_0_fquit();
+ }
+
+
+ memcpy(addr, base->inst_set, base->inst_size);
+
+ addr += base->inst_size;
+
+ memcpy(addr, base->bss_data, base->data_size);
+
+ addr += base->data_size;
+
+ // TODO, empty heap and stack
}
+/*
+* TODO Called from the assembly, system calls
+*/
+
+extern void exec_0(void);
+extern void exec_1(void);
+
void prog_exec(int8_t id, struct program_info *info) {
// TODO, perform a program counter jump
diff --git a/sw/z80/libc/include/string.h b/sw/z80/libc/include/string.h
index f224c87..9c002e3 100644
--- a/sw/z80/libc/include/string.h
+++ b/sw/z80/libc/include/string.h
@@ -3,6 +3,10 @@
#include "types.h"
+void * memset(void *dest, const int8_t src, size_t n);
+
void *memcpy(void *dest, const void *src, size_t n);
+int8_t memcmp(const void *s1, const void *s2, size_t n);
+
#endif
diff --git a/sw/z80/libc/string.c b/sw/z80/libc/string.c
index fd6a7ff..9dd56cc 100644
--- a/sw/z80/libc/string.c
+++ b/sw/z80/libc/string.c
@@ -1,5 +1,15 @@
#include "string.h"
+void * memset(void *dest, const int8_t src, size_t n) {
+
+ void *dp = dest;
+
+ while (n--)
+ *dp++ = src;
+
+ return dest;
+}
+
void *memcpy(void *dest, void *src, size_t n)
{
char *dp = dest;
@@ -11,3 +21,19 @@ void *memcpy(void *dest, void *src, size_t n)
return dest;
}
+
+int8_t memcmp(const void *s1, const void *s2, size_t n) {
+
+ uint8_t u1, u2;
+
+ for ( ; n--; s1++, s2++) {
+
+ u1 = *s1;
+ u2 = *s2;
+
+ if (u1 != u2)
+ return u1 - u2;
+ }
+
+ return 0;
+} \ No newline at end of file