summaryrefslogtreecommitdiffstats
path: root/sw/z80
diff options
context:
space:
mode:
authorleleraffa97@hotmail.it <leleraffa97@hotmail.it>2017-06-23 12:18:24 +0200
committerleleraffa97@hotmail.it <leleraffa97@hotmail.it>2017-06-23 12:18:24 +0200
commitac89960fbe89141aea31da9a329bfa39d67eede7 (patch)
tree5fd8f8baefd80d235ebe43167f89c580d137ce22 /sw/z80
parentlibc memset, memcmp (diff)
downloadz80uPC-ac89960fbe89141aea31da9a329bfa39d67eede7.tar.gz
z80uPC-ac89960fbe89141aea31da9a329bfa39d67eede7.zip
Order and update of the struct
Separation of boot and login sections Improuved program manager system
Diffstat (limited to '')
-rw-r--r--sw/z80/kernel/boot_loader.c24
-rw-r--r--sw/z80/kernel/include/boot.h35
-rw-r--r--sw/z80/kernel/include/login.h23
-rw-r--r--sw/z80/kernel/include/progman.h68
-rw-r--r--sw/z80/kernel/include/syscall.h20
-rw-r--r--sw/z80/kernel/include/sysexe.h55
-rw-r--r--sw/z80/kernel/login.c12
-rw-r--r--sw/z80/kernel/progman.c90
-rw-r--r--sw/z80/kernel/programs.c137
-rw-r--r--sw/z80/kernel/sysexe.c14
10 files changed, 260 insertions, 218 deletions
diff --git a/sw/z80/kernel/boot_loader.c b/sw/z80/kernel/boot_loader.c
deleted file mode 100644
index 03a52b5..0000000
--- a/sw/z80/kernel/boot_loader.c
+++ /dev/null
@@ -1,24 +0,0 @@
-#include "boot.h"
-#include "progman.h"
-#include "string.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) {
-
- return !memcmp(PWD_ADDR, pwd, PWD_SIZE);
-}
-
-void set_pwd(const char *pwd) {
-
- memcpy(PWD_ADDR, pwd, PWD_SIZE);
-} \ No newline at end of file
diff --git a/sw/z80/kernel/include/boot.h b/sw/z80/kernel/include/boot.h
deleted file mode 100644
index 5310e45..0000000
--- a/sw/z80/kernel/include/boot.h
+++ /dev/null
@@ -1,35 +0,0 @@
-#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/login.h b/sw/z80/kernel/include/login.h
new file mode 100644
index 0000000..5fa4b5e
--- /dev/null
+++ b/sw/z80/kernel/include/login.h
@@ -0,0 +1,23 @@
+#ifndef LOGIN_H
+#define LOGIN_H
+
+#include "types.h"
+
+#define LOGIN_PC // TODO find an address in ROM, to perform jumps
+
+#define PWD_ADDR // TODO find an address in ROM, password
+#define PWD_SIZE 8
+
+/*
+* 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
index 5d01f1c..b59e14a 100644
--- a/sw/z80/kernel/include/progman.h
+++ b/sw/z80/kernel/include/progman.h
@@ -13,13 +13,41 @@
#define PROG_0_INFO // TODO
#define PROG_1_INFO // TODO find a space in the ram
-struct program_info {
+struct prog_status {
- volatile int enabled:1;
- volatile int running:1;
- volatile int exiting:1;
- volatile int heap_addr:13;
- volatile void (*quit_cb)(void); // 16
+ // The program is in execution
+
+ uint8_t running:1;
+
+ // The program is executing its quit callback
+
+ uint8_t exiting:1;
+
+ uint8_t unused:6; // TODO, find a usage for these bits
+}:
+
+struct prog_data {
+
+ struct prog_status status;
+
+ /*
+ * The following addresses are needed to map
+ * map the usable memory for dynamic allocations
+ */
+
+ // Virtual address of the heap
+
+ uint8_t heap_addr:12;
+
+ // Virtual address of the stack limit
+
+ uint8_t stack_limit:12;
+
+ /*
+ * Function called when the program exits normally
+ */
+
+ void (*quit_cb)(void); // 16
};
/*
@@ -32,20 +60,23 @@ 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
+*
+* ! Disable virtual addresses when this function is called
*/
#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);
+int8_t prog_req();
/*
* 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
+*
+* ! Disable virtual addresses when this function is called
*/
-struct program_base {
+struct prog_space {
void * inst_set; // pointer to the instructions set
size_t inst_size; // size of the instructions set
@@ -53,33 +84,26 @@ struct program_base {
size_t data_size; // size of the bss/data space
};
-void prog_alloc(int8_t id, struct program_info *info, const struct program_base *base);
+void prog_alloc(int8_t id, struct prog_data *data, const struct prog_space *space);
/*
* It jumps the program counter to the given one
*/
-void prog_exec(int8_t id, struct program_info *info);
+void prog_exec(int8_t id, struct prog_data *data);
/*
* It sets a quit callback
*/
-void prog_0_qcb(void (*callback)(void));
-void prog_1_qcb(void (*callback)(void));
+void prog_0_set_qcb(void (*callback)(void));
+void prog_1_set_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();
+void prog_0_quit(uint8_t force);
+void prog_1_quit(uint8_t force);
#endif \ No newline at end of file
diff --git a/sw/z80/kernel/include/syscall.h b/sw/z80/kernel/include/syscall.h
new file mode 100644
index 0000000..9641f25
--- /dev/null
+++ b/sw/z80/kernel/include/syscall.h
@@ -0,0 +1,20 @@
+#ifndef SYS_CALL
+#define SYS_CALL
+
+/*
+* Enable / disable virtual address traslation
+*/
+
+extern void v_addr(uint8_t flag);
+
+/*
+* Programs execution
+*/
+
+extern void prog_exec_0(void);
+extern void prog_exec_1(void);
+
+extern void prog_stop_0(void);
+extern void prog_stop_1(void);
+
+#endif \ No newline at end of file
diff --git a/sw/z80/kernel/include/sysexe.h b/sw/z80/kernel/include/sysexe.h
new file mode 100644
index 0000000..9c13c09
--- /dev/null
+++ b/sw/z80/kernel/include/sysexe.h
@@ -0,0 +1,55 @@
+#ifndef SYS_EXE
+#define SYS_EXE
+
+#define SYS_EXEC_ADDR // TODO find an address in Kernel space
+
+struct sys_progman {
+
+ // program 0 enabled
+
+ uint8_t prog_0_enabled:1;
+
+ // program 1 enabled
+
+ /*
+ * Obs: A program is enabled when its space is allocated
+ * and its virtual program counter is stored in
+ * the hardware or in the silent_pc.
+ * An enabled program is not necessarly running, it
+ * could be paused too.
+ */
+
+ uint8_t prog_1_enabled:1;
+
+ // running's program id
+
+ uint8_t prog_running:1;
+};
+
+struct sys_exec {
+
+ /*
+ * Virtual addresses are activated
+ */
+
+ uint8_t virtual_addr:1;
+
+ struct sys_progman progman;
+
+ /*
+ * The silent_pc is the place designed to store the
+ * program counter of the program that's not running
+ */
+
+ uint8_t silent_pc:12;
+};
+
+/*
+* Function to access informations
+*/
+
+uint8_t vaddr_enabled();
+
+struct sys_progman * sys_prog_data(struct sys_progman *data);
+
+#endif \ No newline at end of file
diff --git a/sw/z80/kernel/login.c b/sw/z80/kernel/login.c
new file mode 100644
index 0000000..5e100bf
--- /dev/null
+++ b/sw/z80/kernel/login.c
@@ -0,0 +1,12 @@
+#include "login.h"
+#include "string.h"
+
+int8_t authenticate(const char *pwd) {
+
+ return !memcmp(PWD_ADDR, pwd, PWD_SIZE);
+}
+
+void set_pwd(const char *pwd) {
+
+ memcpy(PWD_ADDR, pwd, PWD_SIZE);
+} \ No newline at end of file
diff --git a/sw/z80/kernel/progman.c b/sw/z80/kernel/progman.c
new file mode 100644
index 0000000..44888f8
--- /dev/null
+++ b/sw/z80/kernel/progman.c
@@ -0,0 +1,90 @@
+#include "progman.h"
+#include "string.h"
+#include "syscall.h"
+#include "sysexe.h"
+
+#define EMPTY_PROG_INFO 0x0
+
+volatile struct prog_data *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 sys_progman data;
+
+ sys_prog_data(&data);
+
+ if (data.prog_0_enabled)
+ return PROG_0;
+ else if (data.prog_1_enabled)
+ return PROG_1;
+
+ return PROG_REQ_FULL;
+}
+
+void prog_alloc(int8_t id, struct prog_data *data, const struct prog_space *space) {
+
+ void *addr = (id ? PROG_1_PREFIX : PROG_0_PREFIX) + PROG_VSTART;
+
+ 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
+}
+
+void prog_exec(int8_t id, struct prog_data *data) {
+
+ if (id)
+ prog_exec_1(); // system call
+ else
+ prog_exec_0(); // system call
+}
+
+void prog_0_set_qcb(void (*callback)(void)) {
+
+ prog_0->quit_cb = callback;
+}
+
+void prog_1_set_qcb(void (*callback)(void)) {
+
+ prog_1->quit_cb = callback;
+}
+
+void prog_0_quit(uint8_t force) {
+
+ if (!prog_0->enabled || prog_0->exiting)
+ return;
+
+ if (!force && prog_0->quit_cb)
+ prog_0->quit_cb();
+
+ *prog_0 = EMPTY_PROG_INFO;
+
+ prog_stop_0(); // system call
+}
+
+void prog_1_quit(uint8_t force) {
+
+ if (!prog_1->enabled || prog_1->exiting)
+ return;
+
+ if (!force && prog_1->quit_cb)
+ prog_1->quit_cb();
+
+ *prog_1 = EMPTY_PROG_INFO;
+
+ prog_stop_1(); // system call
+} \ No newline at end of file
diff --git a/sw/z80/kernel/programs.c b/sw/z80/kernel/programs.c
deleted file mode 100644
index 705ea96..0000000
--- a/sw/z80/kernel/programs.c
+++ /dev/null
@@ -1,137 +0,0 @@
-#include "progman.h"
-#include "string.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) {
-
- 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
-}
-
-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
diff --git a/sw/z80/kernel/sysexe.c b/sw/z80/kernel/sysexe.c
new file mode 100644
index 0000000..f020b88
--- /dev/null
+++ b/sw/z80/kernel/sysexe.c
@@ -0,0 +1,14 @@
+#include "sysexe.h"
+
+volatile struct sys_exec *exec_data = SYS_EXEC_ADDR;
+
+uint8_t vaddr_enabled() {
+
+ return exec_data->virtual_addr;
+}
+
+struct sys_progman * sys_prog_data(struct sys_progman *data) {
+
+ *data = exec_data->sys_progman;
+ return data;
+} \ No newline at end of file