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-rw-r--r--sw/z80/kernel/boot_loader.c43
-rw-r--r--sw/z80/kernel/include/boot.h35
-rw-r--r--sw/z80/kernel/include/progman.h86
-rw-r--r--sw/z80/kernel/programs.c110
4 files changed, 274 insertions, 0 deletions
diff --git a/sw/z80/kernel/boot_loader.c b/sw/z80/kernel/boot_loader.c
new file mode 100644
index 0000000..ddca4f9
--- /dev/null
+++ b/sw/z80/kernel/boot_loader.c
@@ -0,0 +1,43 @@
+#include "boot.h"
+#include "progman.h"
+
+#define DEFAULT_EXEC_STATUS 0x4000
+
+struct exec_status *status = EXEC_STATUS;
+
+void boot_init() {
+
+ *status = DEFAULT_EXEC_STATUS;
+
+ // TODO other stuff
+}
+
+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;
+}
+
+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++;
+ }
+} \ No newline at end of file
diff --git a/sw/z80/kernel/include/boot.h b/sw/z80/kernel/include/boot.h
new file mode 100644
index 0000000..5310e45
--- /dev/null
+++ b/sw/z80/kernel/include/boot.h
@@ -0,0 +1,35 @@
+#ifndef BOOT_H
+#define BOOT_H
+
+#include "types.h"
+
+#define LOGIN_PC // TODO find an address in ROM, to perform jumps
+
+#define EXEC_STATUS // TODO find an address in Kernel space
+
+#define PWD_ADDR // TODO find an address in ROM, password
+#define PWD_SIZE 8
+
+struct exec_status {
+
+ volatile int logged_in:1; // authenticated
+ volatile int k_control:1; // no running programs
+ volatile int program_id:1; // current running program id, see "progman.h"
+ volatile int hidden_pc:13; // program counter of the paused program
+};
+
+void boot_init();
+
+/*
+* It returns 1 if succeded, otherwise 0
+*/
+
+int8_t authenticate(const char *pwd);
+
+/*
+* It sets the password in the ROM space, maximum 8 characters
+*/
+
+void set_pwd(const char *pwd);
+
+#endif \ No newline at end of file
diff --git a/sw/z80/kernel/include/progman.h b/sw/z80/kernel/include/progman.h
new file mode 100644
index 0000000..0f56bb3
--- /dev/null
+++ b/sw/z80/kernel/include/progman.h
@@ -0,0 +1,86 @@
+#ifndef PROGRAM_MAN
+#define PROGRAM_MAN
+
+#include "types.h"
+
+#define PROG_0 0x0
+#define PROG_1 0x1
+
+#define PROG_VSTART 0x1000
+#define PROG_0_PREFIX 0xA000
+#define PROG_1_PREFIX 0xC000
+
+#define PROG_0_INFO // TODO
+#define PROG_1_INFO // TODO find a space in the ram
+
+struct program_info {
+
+ volatile int enabled:1;
+ volatile int running:1;
+ volatile int exiting:1;
+ volatile int heap_addr:13;
+ volatile void (*quit_cb)(void); // 16
+};
+
+/*
+* Initialize the program manager system
+*/
+
+void progman_init();
+
+/*
+* Check if it can start a new program
+* If it succedes, the program id is returned,
+* otherwise it is returned an error number
+*/
+
+#define PROG_REQ_FULL -1
+#define PROG_REQ_ERR -2 // Maybe we don't need this, but just in case
+
+int8_t prog_req(struct program_info *info);
+
+/*
+* It allocates a program in the RAM
+* To obtain the right id call prog_req() first
+* Basic informations must be allocated and referenced by a program_base struct
+*/
+
+struct program_base {
+
+ void * inst_set; // pointer to the instructions set
+ 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);
+
+/*
+* It jumps the program counter to the given one
+*/
+
+void prog_exec(int8_t id, struct program_info *info);
+
+/*
+* It sets a quit callback
+*/
+
+void prog_0_qcb(void (*callback)(void));
+void prog_1_qcb(void (*callback)(void));
+
+/*
+* It quits a program, if a callback is set, it will be called
+*/
+
+void prog_0_quit();
+void prog_1_quit();
+
+/*
+* It forces a program to quit
+*/
+
+void prog_0_fquit();
+void prog_1_fquit();
+
+#endif \ No newline at end of file
diff --git a/sw/z80/kernel/programs.c b/sw/z80/kernel/programs.c
new file mode 100644
index 0000000..0f75887
--- /dev/null
+++ b/sw/z80/kernel/programs.c
@@ -0,0 +1,110 @@
+#include "progman.h"
+
+#define EMPTY_PROG_INFO 0x0
+
+struct program_info *prog_0 = PROG_0_INFO,
+ *prog_1 = PROG_1_INFO;
+
+void progman_init() {
+
+ *prog_0 = EMPTY_PROG_INFO;
+ *prog_1 = EMPTY_PROG_INFO;
+
+ // TODO other stuff
+}
+
+int8_t prog_req(struct program_info *info) {
+
+ uint8_t prog;
+
+ if (!prog_0->enabled) {
+
+ prog = PROG_0;
+ *info = *prog_0;
+
+ } else if (!prog_1->enabled) {
+
+ prog = PROG_1;
+ *info = *prog_1;
+
+ } else {
+
+ return PROG_REQ_FULL;
+ }
+
+ return prog;
+}
+
+void prog_alloc(int8_t id, struct program_info *info, const struct program_base *base) {
+
+ // TODO, implements program allocation
+}
+
+void prog_exec(int8_t id, struct program_info *info) {
+
+ // TODO, perform a program counter jump
+}
+
+void prog_0_qcb(void (*callback)(void)) {
+
+ prog_0->quit_cb = callback;
+}
+
+void prog_1_qcb(void (*callback)(void)) {
+
+ prog_1->quit_cb = callback;
+}
+
+void prog_0_quit() {
+
+ if (!prog_0->enabled || prog_0->exiting)
+ return;
+
+ if (prog_0->quit_cb)
+ prog_0->quit_cb();
+
+ // TODO free space in RAM
+
+ *prog_0 = EMPTY_PROG_INFO;
+
+ // TODO jump program counter
+}
+
+void prog_1_quit() {
+
+ if (!prog_1->enabled || prog_1->exiting)
+ return;
+
+ if (prog_1->quit_cb)
+ prog_1->quit_cb();
+
+ // TODO free space in RAM
+
+ *prog_1 = EMPTY_PROG_INFO;
+
+ // TODO jump program counter
+}
+
+void prog_0_fquit() {
+
+ if (!prog_0->enabled)
+ return;
+
+ // TODO free space in RAM
+
+ *prog_0 = EMPTY_PROG_INFO;
+
+ // TODO jump program counter
+}
+
+void prog_1_fquit() {
+
+ if (!prog_1->enabled)
+ return;
+
+ // TODO free space in RAM
+
+ *prog_1 = EMPTY_PROG_INFO;
+
+ // TODO jump program counter
+} \ No newline at end of file
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-23 19:41:17 +0100