diff options
Diffstat (limited to 'sw')
26 files changed, 328 insertions, 969 deletions
diff --git a/sw/z80/build/helvetiOS.lk b/sw/z80/build/helvetiOS.lk deleted file mode 100644 index c16247f..0000000 --- a/sw/z80/build/helvetiOS.lk +++ /dev/null @@ -1,11 +0,0 @@ --mjwx --i build/helvetiOS.hex --b _CODE = 0x0800 --b _DATA = 0x8000 --k /usr/bin/../share/sdcc/lib/z80 --k /usr/share/sdcc/lib/z80 --l z80 -crt0.rel -build/kernel/kernel.rel - --e diff --git a/sw/z80/build/helvetiOS.map b/sw/z80/build/helvetiOS.map deleted file mode 100644 index 98210c7..0000000 --- a/sw/z80/build/helvetiOS.map +++ /dev/null @@ -1,182 +0,0 @@ - ASxxxx Linker V03.00 + NoICE + sdld, page 1. -Hexadecimal [32-Bits] - -Area Addr Size Decimal Bytes (Attributes) --------------------------------- ---- ---- ------- ----- ------------ -. .ABS. 00000000 00000000 = 0. bytes (ABS,CON) - - Value Global Global Defined In Module - ----- -------------------------------- ------------------------ - 00000000 .__.ABS. kernel - 00000000 l__BSEG - 00000000 l__BSS - 00000000 l__CABS - 00000000 l__DABS - 00000000 l__DATA - 00000000 l__HEADER - 00000000 l__HEAP - 00000000 l__HOME - 00000000 l__INITIALIZED - 00000000 l__INITIALIZER - 00000000 s__CABS - 00000000 s__DABS - 00000000 s__HEADER - 00000000 s__HEADER0 - 00000000 s__HEADER1 - 00000000 s__HEADER2 - 00000000 s__HEADER3 - 00000000 s__HEADER4 - 00000000 s__HEADER5 - 00000000 s__HEADER6 - 00000000 s__HEADER7 - 00000000 s__HEADER8 - 00000001 l__GSFINAL - 00000002 l__HEADER1 - 00000002 l__HEADER2 - 00000002 l__HEADER3 - 00000002 l__HEADER4 - 00000002 l__HEADER5 - 00000002 l__HEADER6 - 00000002 l__HEADER7 - 00000003 l__HEADER0 - 00000006 l__GSINIT - 0000000C l__HEADER8 - 00000017 l__CODE - 00000800 s__CODE - 00000817 s__GSINIT - 00000817 s__HOME - 00000817 s__INITIALIZER - 0000081D s__GSFINAL - 00008000 s__BSEG - 00008000 s__BSS - 00008000 s__DATA - 00008000 s__HEAP - 00008000 s__INITIALIZED - ASxxxx Linker V03.00 + NoICE + sdld, page 2. -Hexadecimal [32-Bits] - -Area Addr Size Decimal Bytes (Attributes) --------------------------------- ---- ---- ------- ----- ------------ -_CODE 00000800 00000017 = 23. bytes (REL,CON) - - Value Global Global Defined In Module - ----- -------------------------------- ------------------------ - 00000800 __clock crt0 - 00000804 _exit crt0 - 0000080A _main kernel - ASxxxx Linker V03.00 + NoICE + sdld, page 3. -Hexadecimal [32-Bits] - -Area Addr Size Decimal Bytes (Attributes) --------------------------------- ---- ---- ------- ----- ------------ -_HEADER0 00000000 00000003 = 3. bytes (ABS,CON) - - Value Global Global Defined In Module - ----- -------------------------------- ------------------------ - ASxxxx Linker V03.00 + NoICE + sdld, page 4. -Hexadecimal [32-Bits] - -Area Addr Size Decimal Bytes (Attributes) --------------------------------- ---- ---- ------- ----- ------------ -_HEADER1 00000000 00000002 = 2. bytes (ABS,CON) - - Value Global Global Defined In Module - ----- -------------------------------- ------------------------ - ASxxxx Linker V03.00 + NoICE + sdld, page 5. -Hexadecimal [32-Bits] - -Area Addr Size Decimal Bytes (Attributes) --------------------------------- ---- ---- ------- ----- ------------ -_HEADER2 00000000 00000002 = 2. bytes (ABS,CON) - - Value Global Global Defined In Module - ----- -------------------------------- ------------------------ - ASxxxx Linker V03.00 + NoICE + sdld, page 6. -Hexadecimal [32-Bits] - -Area Addr Size Decimal Bytes (Attributes) --------------------------------- ---- ---- ------- ----- ------------ -_HEADER3 00000000 00000002 = 2. bytes (ABS,CON) - - Value Global Global Defined In Module - ----- -------------------------------- ------------------------ - ASxxxx Linker V03.00 + NoICE + sdld, page 7. -Hexadecimal [32-Bits] - -Area Addr Size Decimal Bytes (Attributes) --------------------------------- ---- ---- ------- ----- ------------ -_HEADER4 00000000 00000002 = 2. bytes (ABS,CON) - - Value Global Global Defined In Module - ----- -------------------------------- ------------------------ - ASxxxx Linker V03.00 + NoICE + sdld, page 8. -Hexadecimal [32-Bits] - -Area Addr Size Decimal Bytes (Attributes) --------------------------------- ---- ---- ------- ----- ------------ -_HEADER5 00000000 00000002 = 2. bytes (ABS,CON) - - Value Global Global Defined In Module - ----- -------------------------------- ------------------------ - ASxxxx Linker V03.00 + NoICE + sdld, page 9. -Hexadecimal [32-Bits] - -Area Addr Size Decimal Bytes (Attributes) --------------------------------- ---- ---- ------- ----- ------------ -_HEADER6 00000000 00000002 = 2. bytes (ABS,CON) - - Value Global Global Defined In Module - ----- -------------------------------- ------------------------ - ASxxxx Linker V03.00 + NoICE + sdld, page 10. -Hexadecimal [32-Bits] - -Area Addr Size Decimal Bytes (Attributes) --------------------------------- ---- ---- ------- ----- ------------ -_HEADER7 00000000 00000002 = 2. bytes (ABS,CON) - - Value Global Global Defined In Module - ----- -------------------------------- ------------------------ - ASxxxx Linker V03.00 + NoICE + sdld, page 11. -Hexadecimal [32-Bits] - -Area Addr Size Decimal Bytes (Attributes) --------------------------------- ---- ---- ------- ----- ------------ -_HEADER8 00000000 0000000C = 12. bytes (ABS,CON) - - Value Global Global Defined In Module - ----- -------------------------------- ------------------------ - ASxxxx Linker V03.00 + NoICE + sdld, page 12. -Hexadecimal [32-Bits] - -Area Addr Size Decimal Bytes (Attributes) --------------------------------- ---- ---- ------- ----- ------------ -_GSINIT 00000817 00000006 = 6. bytes (REL,CON) - - Value Global Global Defined In Module - ----- -------------------------------- ------------------------ - 00000817 gsinit crt0 - - ASxxxx Linker V03.00 + NoICE + sdld, page 13. -Hexadecimal [32-Bits] - -Area Addr Size Decimal Bytes (Attributes) --------------------------------- ---- ---- ------- ----- ------------ -_GSFINAL 0000081D 00000001 = 1. bytes (REL,CON) - - Value Global Global Defined In Module - ----- -------------------------------- ------------------------ - ASxxxx Linker V03.00 + NoICE + sdld, page 14. - -Files Linked [ module(s) ] - -crt0.rel [ crt0 ] -build/kernel/kernel.rel [ kernel ] - - ASxxxx Linker V03.00 + NoICE + sdld, page 15. - -User Base Address Definitions - -_CODE = 0x0800 -_DATA = 0x8000 - -
\ No newline at end of file diff --git a/sw/z80/build/helvetiOS.noi b/sw/z80/build/helvetiOS.noi deleted file mode 100644 index 1b9c284..0000000 --- a/sw/z80/build/helvetiOS.noi +++ /dev/null @@ -1,50 +0,0 @@ -DEF .__.ABS. 0x0 -DEF l__BSEG 0x0 -DEF l__BSS 0x0 -DEF l__CABS 0x0 -DEF l__DABS 0x0 -DEF l__DATA 0x0 -DEF l__HEADER 0x0 -DEF l__HEAP 0x0 -DEF l__HOME 0x0 -DEF l__INITIALIZED 0x0 -DEF l__INITIALIZER 0x0 -DEF s__CABS 0x0 -DEF s__DABS 0x0 -DEF s__HEADER 0x0 -DEF s__HEADER0 0x0 -DEF s__HEADER1 0x0 -DEF s__HEADER2 0x0 -DEF s__HEADER3 0x0 -DEF s__HEADER4 0x0 -DEF s__HEADER5 0x0 -DEF s__HEADER6 0x0 -DEF s__HEADER7 0x0 -DEF s__HEADER8 0x0 -DEF l__GSFINAL 0x1 -DEF l__HEADER1 0x2 -DEF l__HEADER2 0x2 -DEF l__HEADER3 0x2 -DEF l__HEADER4 0x2 -DEF l__HEADER5 0x2 -DEF l__HEADER6 0x2 -DEF l__HEADER7 0x2 -DEF l__HEADER0 0x3 -DEF l__GSINIT 0x6 -DEF l__HEADER8 0xC -DEF l__CODE 0x17 -DEF s__CODE 0x800 -DEF s__GSINIT 0x817 -DEF s__HOME 0x817 -DEF s__INITIALIZER 0x817 -DEF s__GSFINAL 0x81D -DEF s__BSEG 0x8000 -DEF s__BSS 0x8000 -DEF s__DATA 0x8000 -DEF s__HEAP 0x8000 -DEF s__INITIALIZED 0x8000 -DEF __clock 0x800 -DEF _exit 0x804 -DEF _main 0x80A -DEF gsinit 0x817 -LOAD build/helvetiOS.ihx diff --git a/sw/z80/build/kernel/kernel.asm b/sw/z80/build/kernel/kernel.asm deleted file mode 100644 index a29db4d..0000000 --- a/sw/z80/build/kernel/kernel.asm +++ /dev/null @@ -1,65 +0,0 @@ -;-------------------------------------------------------- -; File Created by SDCC : free open source ANSI-C Compiler -; Version 3.5.0 #9253 (Mar 24 2016) (Linux) -; This file was generated Tue May 2 18:13:35 2017 -;-------------------------------------------------------- - .module kernel - .optsdcc -mz80 - -;-------------------------------------------------------- -; Public variables in this module -;-------------------------------------------------------- - .globl _main -;-------------------------------------------------------- -; special function registers -;-------------------------------------------------------- -;-------------------------------------------------------- -; ram data -;-------------------------------------------------------- - .area _DATA -;-------------------------------------------------------- -; ram data -;-------------------------------------------------------- - .area _INITIALIZED -;-------------------------------------------------------- -; absolute external ram data -;-------------------------------------------------------- - .area _DABS (ABS) -;-------------------------------------------------------- -; global & static initialisations -;-------------------------------------------------------- - .area _HOME - .area _GSINIT - .area _GSFINAL - .area _GSINIT -;-------------------------------------------------------- -; Home -;-------------------------------------------------------- - .area _HOME - .area _HOME -;-------------------------------------------------------- -; code -;-------------------------------------------------------- - .area _CODE -;kernel/kernel.c:4: void main(void) -; --------------------------------- -; Function main -; --------------------------------- -_main:: -;kernel/kernel.c:7: for (i = 0; i < 10; i++) { - ld de,#0x000A -00104$: -;kernel/kernel.c:8: j--; - ld c,e - ld b,d - dec bc - ld e, c -;kernel/kernel.c:7: for (i = 0; i < 10; i++) { - ld a,b - ld d,a - or a,c - jr NZ,00104$ - ret - .area _CODE - .area _INITIALIZER - .area _CABS (ABS) diff --git a/sw/z80/build/kernel/kernel.lst b/sw/z80/build/kernel/kernel.lst deleted file mode 100644 index 8ec7438..0000000 --- a/sw/z80/build/kernel/kernel.lst +++ /dev/null @@ -1,65 +0,0 @@ - 1 ;-------------------------------------------------------- - 2 ; File Created by SDCC : free open source ANSI-C Compiler - 3 ; Version 3.5.0 #9253 (Mar 24 2016) (Linux) - 4 ; This file was generated Tue May 2 18:13:35 2017 - 5 ;-------------------------------------------------------- - 6 .module kernel - 7 .optsdcc -mz80 - 8 - 9 ;-------------------------------------------------------- - 10 ; Public variables in this module - 11 ;-------------------------------------------------------- - 12 .globl _main - 13 ;-------------------------------------------------------- - 14 ; special function registers - 15 ;-------------------------------------------------------- - 16 ;-------------------------------------------------------- - 17 ; ram data - 18 ;-------------------------------------------------------- - 19 .area _DATA - 20 ;-------------------------------------------------------- - 21 ; ram data - 22 ;-------------------------------------------------------- - 23 .area _INITIALIZED - 24 ;-------------------------------------------------------- - 25 ; absolute external ram data - 26 ;-------------------------------------------------------- - 27 .area _DABS (ABS) - 28 ;-------------------------------------------------------- - 29 ; global & static initialisations - 30 ;-------------------------------------------------------- - 31 .area _HOME - 32 .area _GSINIT - 33 .area _GSFINAL - 34 .area _GSINIT - 35 ;-------------------------------------------------------- - 36 ; Home - 37 ;-------------------------------------------------------- - 38 .area _HOME - 39 .area _HOME - 40 ;-------------------------------------------------------- - 41 ; code - 42 ;-------------------------------------------------------- - 43 .area _CODE - 44 ;kernel/kernel.c:4: void main(void) - 45 ; --------------------------------- - 46 ; Function main - 47 ; --------------------------------- - 0000 48 _main:: - 49 ;kernel/kernel.c:7: for (i = 0; i < 10; i++) { - 0000 11 0A 00 [10] 50 ld de,#0x000A - 0003 51 00104$: - 52 ;kernel/kernel.c:8: j--; - 0003 4B [ 4] 53 ld c,e - 0004 42 [ 4] 54 ld b,d - 0005 0B [ 6] 55 dec bc - 0006 59 [ 4] 56 ld e, c - 57 ;kernel/kernel.c:7: for (i = 0; i < 10; i++) { - 0007 78 [ 4] 58 ld a,b - 0008 57 [ 4] 59 ld d,a - 0009 B1 [ 4] 60 or a,c - 000A 20 F7 [12] 61 jr NZ,00104$ - 000C C9 [10] 62 ret - 63 .area _CODE - 64 .area _INITIALIZER - 65 .area _CABS (ABS) diff --git a/sw/z80/build/kernel/kernel.rel b/sw/z80/build/kernel/kernel.rel deleted file mode 100644 index 1079edc..0000000 --- a/sw/z80/build/kernel/kernel.rel +++ /dev/null @@ -1,23 +0,0 @@ -XL2 -H 9 areas 2 global symbols -M kernel -O -mz80 -S .__.ABS. Def0000 -A _CODE size D flags 0 addr 0 -S _main Def0000 -A _DATA size 0 flags 0 addr 0 -A _INITIALIZED size 0 flags 0 addr 0 -A _DABS size 0 flags 8 addr 0 -A _HOME size 0 flags 0 addr 0 -A _GSINIT size 0 flags 0 addr 0 -A _GSFINAL size 0 flags 0 addr 0 -A _INITIALIZER size 0 flags 0 addr 0 -A _CABS size 0 flags 8 addr 0 -T 00 00 -R 00 00 00 00 -T 00 00 11 0A 00 -R 00 00 00 00 -T 03 00 -R 00 00 00 00 -T 03 00 4B 42 0B 59 78 57 B1 20 F7 C9 -R 00 00 00 00 diff --git a/sw/z80/build/kernel/kernel.sym b/sw/z80/build/kernel/kernel.sym deleted file mode 100644 index d01735c..0000000 --- a/sw/z80/build/kernel/kernel.sym +++ /dev/null @@ -1,27 +0,0 @@ - ASxxxx Assembler V02.00 + NoICE + SDCC mods (Zilog Z80 / Hitachi HD64180), page 1. -Hexadecimal [16-Bits] - -Symbol Table - - .__.$$$. = 2710 L - .__.ABS. = 0000 G - .__.CPU. = 0000 L - .__.H$L. = 0000 L - 0 _main 0000 GR - - - ASxxxx Assembler V02.00 + NoICE + SDCC mods (Zilog Z80 / Hitachi HD64180), page 2. -Hexadecimal [16-Bits] - -Area Table - - 0 _CODE size D flags 0 - 1 _DATA size 0 flags 0 - 2 _INITIALIZED size 0 flags 0 - 3 _DABS size 0 flags 8 - 4 _HOME size 0 flags 0 - 5 _GSINIT size 0 flags 0 - 6 _GSFINAL size 0 flags 0 - 7 _INITIALIZER size 0 flags 0 - 8 _CABS size 0 flags 8 - diff --git a/sw/z80/crt0.rel b/sw/z80/crt0.rel deleted file mode 100644 index 809c0e6..0000000 --- a/sw/z80/crt0.rel +++ /dev/null @@ -1,86 +0,0 @@ -XL2 -H 14 areas 5 global symbols -M crt0 -S _main Ref0000 -S .__.ABS. Def0000 -A _CODE size A flags 0 addr 0 -S __clock Def0000 -S _exit Def0004 -A _HEADER size 0 flags 8 addr 0 -A _HEADER0 size 3 flags 8 addr 0 -A _HEADER1 size 2 flags 8 addr 8 -A _HEADER2 size 2 flags 8 addr 10 -A _HEADER3 size 2 flags 8 addr 18 -A _HEADER4 size 2 flags 8 addr 20 -A _HEADER5 size 2 flags 8 addr 28 -A _HEADER6 size 2 flags 8 addr 30 -A _HEADER7 size 2 flags 8 addr 38 -A _HEADER8 size C flags 8 addr 100 -A _HOME size 0 flags 0 addr 0 -A _INITIALIZER size 0 flags 0 addr 0 -A _GSINIT size 6 flags 0 addr 0 -S gsinit Def0000 -A _GSFINAL size 1 flags 0 addr 0 -A _DATA size 0 flags 0 addr 0 -A _INITIALIZED size 0 flags 0 addr 0 -A _BSEG size 0 flags 0 addr 0 -A _BSS size 0 flags 0 addr 0 -A _HEAP size 0 flags 0 addr 0 -T 00 00 -R 00 00 02 00 -T 00 00 C3 00 01 -R 00 00 02 00 00 03 0A 00 -T 08 00 -R 00 00 03 00 -T 08 00 ED 4D -R 00 00 03 00 -T 10 00 -R 00 00 04 00 -T 10 00 ED 4D -R 00 00 04 00 -T 18 00 -R 00 00 05 00 -T 18 00 ED 4D -R 00 00 05 00 -T 20 00 -R 00 00 06 00 -T 20 00 ED 4D -R 00 00 06 00 -T 28 00 -R 00 00 07 00 -T 28 00 ED 4D -R 00 00 07 00 -T 30 00 -R 00 00 08 00 -T 30 00 ED 4D -R 00 00 08 00 -T 38 00 -R 00 00 09 00 -T 38 00 ED 4D -R 00 00 09 00 -T 00 01 -R 00 00 0A 00 -T 00 01 -R 00 00 0A 00 -T 00 01 31 FF FF CD 00 00 CD 00 00 C3 04 00 -R 00 00 0A 00 00 06 0D 00 02 09 00 00 00 0C 00 00 -T 00 00 -R 00 00 00 00 -T 00 00 3E 02 CF C9 -R 00 00 00 00 -T 04 00 -R 00 00 00 00 -T 04 00 3E 00 CF -R 00 00 00 00 -T 07 00 -R 00 00 00 00 -T 07 00 76 18 FD -R 00 00 00 00 -T 00 00 -R 00 00 0D 00 -T 00 00 78 B1 28 02 ED B0 -R 00 00 0D 00 -T 06 00 -R 00 00 0D 00 -T 00 00 C9 -R 00 00 0E 00 diff --git a/sw/z80/kernel/pio.c b/sw/z80/kernel/drivers/pio.c index 4b9caee..e29383f 100644 --- a/sw/z80/kernel/pio.c +++ b/sw/z80/kernel/drivers/pio.c @@ -1,4 +1,4 @@ -#include "pio.h" +#include "drivers/pio.h" static uint8_t *pio_port = (uint8_t *) ADDR_DEV_PIO; static uint8_t *pio_ctrl = (uint8_t *) (ADDR_DEV_PIO + 2); @@ -15,4 +15,5 @@ void _pio_command(int port, uint8_t cmd) void pio_set_mode(int port, int mode) { + } diff --git a/sw/z80/kernel/usart.c b/sw/z80/kernel/drivers/usart.c index 9ec6dbd..c54fe37 100644 --- a/sw/z80/kernel/usart.c +++ b/sw/z80/kernel/drivers/usart.c @@ -1,4 +1,4 @@ -#include "usart.h" +#include "drivers/usart.h" static struct _usart_device *_usart = (struct _usart_device *) ADDR_DEV_USART; diff --git a/sw/z80/kernel/include/devices.h b/sw/z80/kernel/include/devices.h index e8c183f..a846f9b 100644 --- a/sw/z80/kernel/include/devices.h +++ b/sw/z80/kernel/include/devices.h @@ -8,6 +8,8 @@ #define ADDR_DEV_CTC 0x4100 #define ADDR_DEV_PIO 0x4200 +#define ADDR_DEV_MMU + #define ADDR_DEV_RAM 0x8000 #endif diff --git a/sw/z80/kernel/include/pio.h b/sw/z80/kernel/include/drivers/pio.h index 5d289ca..5d289ca 100644 --- a/sw/z80/kernel/include/pio.h +++ b/sw/z80/kernel/include/drivers/pio.h diff --git a/sw/z80/kernel/include/drivers/usart.h b/sw/z80/kernel/include/drivers/usart.h new file mode 100644 index 0000000..b85ee3e --- /dev/null +++ b/sw/z80/kernel/include/drivers/usart.h @@ -0,0 +1,155 @@ +#ifndef __USART_H__ +#define __USART_H__ + +#include "types.h" +#include "devices.h" + +#include "string.h" + +// baudrate clock divisors +// values from TL16C550C datasheet (table 9 for 1.8432 MHz crystal) +#define USART_BAUDRATE_50 2304 +#define USART_BAUDRATE_75 1536 +#define USART_BAUDRATE_110 1047 +#define USART_BAUDRATE_134_5 857 +#define USART_BAUDRATE_150 768 +#define USART_BAUDRATE_300 384 +#define USART_BAUDRATE_600 192 +#define USART_BAUDRATE_1200 96 +#define USART_BAUDRATE_1800 64 +#define USART_BAUDRATE_2000 58 +#define USART_BAUDRATE_2400 48 +#define USART_BAUDRATE_3600 32 +#define USART_BAUDRATE_4800 24 +#define USART_BAUDRATE_7200 16 +#define USART_BAUDRATE_9600 12 +#define USART_BAUDRATE_19200 6 +#define USART_BAUDRATE_38400 3 +#define USART_BAUDRATE_56000 3 + +// parity +#define USART_PARITY_NONE 0 +#define USART_PARITY_EVEN 1 +#define USART_PARITY_ODD 2 + +// stop bits +#define USART_STOP_BITS_1 10 +#define USART_STOP_BITS_15 15 +#define USART_STOP_BITS_2 20 + +// word lenght +#define USART_WORD_LENGTH_5 0 +#define USART_WORD_LENGTH_6 1 +#define USART_WORD_LENGTH_7 2 +#define USART_WORD_LENGTH_8 3 + +// autoflow +#define USART_AUTOFLOW_ALL 3 +#define USART_AUTOFLOW_CTS 2 +#define USART_AUTOFLOW_OFF 0 + +/* stuctures for usart registers */ +struct IER +{ + volatile uint received_data_interrupt :1; + volatile uint transmitter_empty_interrupt :1; + volatile uint receiver_line_status_interrupt :1; + volatile uint modem_status_interrupt :1; + volatile uint reserved :4; +}; + +struct IIR +{ + volatile uint interrupt_pending :1; + volatile uint interrupt_id :3; + volatile uint reserved :2; + volatile uint fifos :2; +}; + +struct FCR +{ + volatile uint fifo_enable :1; + volatile uint receiver_fifo_rst :1; + volatile uint trasmitter_fifo_rst :1; + volatile uint dma_mode_select :1; + volatile uint reserved :1; + volatile uint receiver_trigger :2; +}; + +struct LCR +{ + volatile uint word_length :2; + volatile uint stop_bits :1; + volatile uint parity :1; + volatile uint even_parity :1; + volatile uint stick_parity :1; + volatile uint break_control :1; + volatile uint divisor_latch_access :1; +}; + +struct MCR +{ + volatile uint data_terminal_ready :1; + volatile uint request_to_send :1; + volatile uint out1; + volatile uint out2; + volatile uint loop; + volatile uint autoflow :1; + volatile uint reserved :2; +}; + +struct LSR +{ + volatile uint data_ready :1; + volatile uint overrun_error :1; + volatile uint parity_error :1; + volatile uint framing_error :1; + volatile uint break_interrupt :1; + volatile uint transmitter_holder_empty :1; + volatile uint transmitter_empty :1; + volatile uint fifo_recv_error :1; +}; + +struct MSR +{ + volatile uint delta_cts :1; + volatile uint delta_data_set_ready :1; + volatile uint trailing_edge_ring_indicator :1; + volatile uint delta_data_carrier_detect :1; + volatile uint clear_to_send :1; + volatile uint data_set_ready :1; + volatile uint ring_indicator :1; + volatile uint data_carrier_detect :1; +}; + +/* this structure is only for internal usage */ +struct _usart_device +{ + register_t buffer; // also used as LSB for divisor latch + struct IER IER; + struct IIR IIR; + struct FCR FCR; + struct LCR LCR; + struct MCR MCR; + struct LSR LSR; + struct MSR MSR; + register_t scratch; +}; + + +// setup functions (wrappers) +void usart_set_baudrate(uint16_t baudrate); +void usart_set_parity(int mode); +void usart_set_stop_bits(int count); +void usart_set_word_length(int length); +void usart_set_autoflow(int mode); + +inline void usart_init(uint16_t baudrate, int parity, int stop_bits); + +void usart_transmit(uint8_t data); +uint8_t usart_receive(); + +int usart_write(uint8_t *data, size_t size); +int usart_read(uint8_t *buffer, size_t count); + +#endif // __USART__H__ diff --git a/sw/z80/kernel/include/login.h b/sw/z80/kernel/include/login.h deleted file mode 100644 index 5fa4b5e..0000000 --- a/sw/z80/kernel/include/login.h +++ /dev/null @@ -1,23 +0,0 @@ -#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/memory.h b/sw/z80/kernel/include/memory.h new file mode 100644 index 0000000..5bca5a5 --- /dev/null +++ b/sw/z80/kernel/include/memory.h @@ -0,0 +1,48 @@ +#ifndef __MEMORY_H__ +#define __MEMORY_H__ + +#include "types.h" +#include "devices.h" + +/* maximum number of pages on the system */ +#define PAGES_MAX_COUNT 32 + +/* in our system there are only 16 pages since only 64KB can be addressed + * to optimize the memory management in ROM and RAM only pages from this set + * shall be used + */ +// ROM +#define ADDR_PAGE_0 0x0000 +#define ADDR_PAGE_1 0x1000 +#define ADDR_PAGE_2 0x2000 +#define ADDR_PAGE_3 0x3000 +// IOSPACE +#define ADDR_PAGE_4 0x4000 +#define ADDR_PAGE_5 0x5000 +#define ADDR_PAGE_6 0x6000 +#define ADDR_PAGE_7 0x7000 +// RAM +#define ADDR_PAGE_8 0x8000 +#define ADDR_PAGE_9 0x9000 +#define ADDR_PAGE_10 0xA000 +#define ADDR_PAGE_11 0xB000 +#define ADDR_PAGE_12 0xC000 +#define ADDR_PAGE_13 0xD000 +#define ADDR_PAGE_14 0xE000 +#define ADDR_PAGE_15 0xF000 + +struct page +{ + uint used :1; + uint8_t pid; // process owner of the page + uint16_t addr; // physical address +}; + +extern struct page pages_table[PAGES_MAX_COUNT]; + +int mmu_write_table(void); + +int page_map(int page, int pid, uint16_t addr); +int page_unmap(int page); + +#endif // __MEMORY_H__
\ No newline at end of file diff --git a/sw/z80/kernel/include/process.h b/sw/z80/kernel/include/process.h new file mode 100644 index 0000000..ffd39e7 --- /dev/null +++ b/sw/z80/kernel/include/process.h @@ -0,0 +1,42 @@ +#ifndef __PROCESS_H__ +#define __PROCESS_H__ + +#include "types.h" + + /* maximum number of processes (i.e. pages in ram) + * since each program can use only one page in ram + */ +#define PROC_COUNT 2 + +struct executable +{ + void *text; + size_t text_size; + void *bss; + size_t bss_size; +} + +struct process +{ + uint blocked :1; // process is waiting for hardware or locked + uint running :1; // pid is used + uint pages[4]; // pages used by the process + // TODO: implement quick callback? +}; + +/* the pid is defined with a single byte (pid_t is uint8_t), because of that + * there cannot be more than 255 processes open at the same time. this is a + * limitation but for our purposes is more than enough + */ +extern struct process proc_table[255]; + +static pid_t newpid(void); + +int fork(void); +int exec(char *path, char *args); +int spawn(char *path, char *args); + +pid_t getpid(void); +int kill(pid_t pid); + +#endif // __PROCESS_H__ diff --git a/sw/z80/kernel/include/progman.h b/sw/z80/kernel/include/progman.h deleted file mode 100644 index b59e14a..0000000 --- a/sw/z80/kernel/include/progman.h +++ /dev/null @@ -1,109 +0,0 @@ -#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 prog_status { - - // 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 -}; - -/* -* 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 -* -* ! Disable virtual addresses when this function is called -*/ - -#define PROG_REQ_FULL -1 - -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 prog_space { - - 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 -}; - -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 prog_data *data); - -/* -* It sets a quit callback -*/ - -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(uint8_t force); -void prog_1_quit(uint8_t force); - -#endif
\ No newline at end of file diff --git a/sw/z80/kernel/include/sysexe.h b/sw/z80/kernel/include/sysexe.h deleted file mode 100644 index 9c13c09..0000000 --- a/sw/z80/kernel/include/sysexe.h +++ /dev/null @@ -1,55 +0,0 @@ -#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/include/types.h b/sw/z80/kernel/include/types.h index 552b7e9..44df3eb 100644 --- a/sw/z80/kernel/include/types.h +++ b/sw/z80/kernel/include/types.h @@ -3,11 +3,14 @@ #define register_t volatile unsigned char +#define uint unsigned int + #define int8_t char #define uint8_t unsigned char #define int16_t int -#define uint16_t unsigned int +#define uint16_t unsigned long int #define size_t uint16_t +#define pid_t uint8_t #endif diff --git a/sw/z80/kernel/include/usart.h b/sw/z80/kernel/include/usart.h deleted file mode 100644 index 3e5c070..0000000 --- a/sw/z80/kernel/include/usart.h +++ /dev/null @@ -1,149 +0,0 @@ -#ifndef __USART_H__ -#define __USART_H__ - -#include "types.h" -#include "devices.h" - -#include "string.h" - -// baudrate clock divisors -// values from TL16C550C datasheet (table 9 for 1.8432 MHz crystal) -#define USART_BAUDRATE_50 2304 -#define USART_BAUDRATE_75 1536 -#define USART_BAUDRATE_110 1047 -#define USART_BAUDRATE_134_5 857 -#define USART_BAUDRATE_150 768 -#define USART_BAUDRATE_300 384 -#define USART_BAUDRATE_600 192 -#define USART_BAUDRATE_1200 96 -#define USART_BAUDRATE_1800 64 -#define USART_BAUDRATE_2000 58 -#define USART_BAUDRATE_2400 48 -#define USART_BAUDRATE_3600 32 -#define USART_BAUDRATE_4800 24 -#define USART_BAUDRATE_7200 16 -#define USART_BAUDRATE_9600 12 -#define USART_BAUDRATE_19200 6 -#define USART_BAUDRATE_38400 3 -#define USART_BAUDRATE_56000 3 - -// parity -#define USART_PARITY_NONE 0 -#define USART_PARITY_EVEN 1 -#define USART_PARITY_ODD 2 - -// stop bits -#define USART_STOP_BITS_1 10 -#define USART_STOP_BITS_15 15 -#define USART_STOP_BITS_2 20 - -// word lenght -#define USART_WORD_LENGTH_5 0 -#define USART_WORD_LENGTH_6 1 -#define USART_WORD_LENGTH_7 2 -#define USART_WORD_LENGTH_8 3 - -// autoflow -#define USART_AUTOFLOW_ALL 3 -#define USART_AUTOFLOW_CTS 2 -#define USART_AUTOFLOW_OFF 0 - - -/* this structure is only for internal usage */ -struct _usart_device -{ - register_t buffer; // also used as LSB for divisor latch - - struct IER - { - volatile int received_data_interrupt :1; - volatile int transmitter_empty_interrupt :1; - volatile int receiver_line_status_interrupt :1; - volatile int modem_status_interrupt :1; - volatile int reserved :4; - } IER; - - struct IIR - { - volatile int interrupt_pending :1; - volatile int interrupt_id :3; - volatile int reserved :2; - volatile int fifos :2; - } IIR; - - struct FCR - { - volatile int fifo_enable :1; - volatile int receiver_fifo_rst :1; - volatile int trasmitter_fifo_rst :1; - volatile int dma_mode_select :1; - volatile int reserved :1; - volatile int receiver_trigger :2; - } FCR; - - struct LCR - { - volatile int word_length :2; - volatile int stop_bits :1; - volatile int parity :1; - volatile int even_parity :1; - volatile int stick_parity :1; - volatile int break_control :1; - volatile int divisor_latch_access :1; - } LCR; - - struct MCR - { - volatile int data_terminal_ready :1; - volatile int request_to_send :1; - volatile int out1; - volatile int out2; - volatile int loop; - volatile int autoflow :1; - volatile int reserved :2; - } MCR; - - struct LSR - { - volatile int data_ready :1; - volatile int overrun_error :1; - volatile int parity_error :1; - volatile int framing_error :1; - volatile int break_interrupt :1; - volatile int transmitter_holder_empty :1; - volatile int transmitter_empty :1; - volatile int fifo_recv_error :1; - } LSR; - - struct MSR - { - volatile int delta_cts :1; - volatile int delta_data_set_ready :1; - volatile int trailing_edge_ring_indicator :1; - volatile int delta_data_carrier_detect :1; - volatile int clear_to_send :1; - volatile int data_set_ready :1; - volatile int ring_indicator :1; - volatile int data_carrier_detect :1; - } MSR; - - register_t scratch; -}; - - -// setup functions (wrappers) -void usart_set_baudrate(uint16_t baudrate); -void usart_set_parity(int mode); -void usart_set_stop_bits(int count); -void usart_set_word_length(int length); -void usart_set_autoflow(int mode); - -inline void usart_init(uint16_t baudrate, int parity, int stop_bits); - -void usart_transmit(uint8_t data); -uint8_t usart_receive(); - -int usart_write(uint8_t *data, size_t size); -int usart_read(uint8_t *buffer, size_t count); - -#endif // __USART__H__ diff --git a/sw/z80/kernel/login.c b/sw/z80/kernel/login.c deleted file mode 100644 index 5e100bf..0000000 --- a/sw/z80/kernel/login.c +++ /dev/null @@ -1,12 +0,0 @@ -#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/memory.c b/sw/z80/kernel/memory.c new file mode 100644 index 0000000..f174906 --- /dev/null +++ b/sw/z80/kernel/memory.c @@ -0,0 +1,43 @@ +#include "memory.h" + +struct page pages_table[PAGES_MAX_COUNT]; + +int mmu_write_table(void) +{ + int i; + + for (i = 0; i < PAGES_MAX_COUNT; i++) { + if (pages_table[i].used) { + // write to mmu table + } + } + + return 0; +} + +int page_map(int page, int pid, uint16_t addr) +{ + if (page >= PAGES_MAX_COUNT) + return -1; + + if (pages_table[page].used) + return -2; + + pages_table[page].addr = addr; + pages_table[page].pid = pid; + + pages_table[page].used = 1; + return 0; +} + +int page_unmap(int page) +{ + if (page >= PAGES_MAX_COUNT) + return -1; + + if (pages_table[page].used == 0) + return -2; + + pages_table[page].used = 0; + return 0; +} diff --git a/sw/z80/kernel/process.c b/sw/z80/kernel/process.c new file mode 100644 index 0000000..f33ead6 --- /dev/null +++ b/sw/z80/kernel/process.c @@ -0,0 +1,18 @@ +#include "process.h" + +struct process proc_table[255]; + +int fork(void) +{ + +} + +int exec(char *path, char *args) +{ + +} + +int spawn(char *path, char *args) +{ + +}
\ No newline at end of file diff --git a/sw/z80/kernel/progman.c b/sw/z80/kernel/progman.c deleted file mode 100644 index 44888f8..0000000 --- a/sw/z80/kernel/progman.c +++ /dev/null @@ -1,90 +0,0 @@ -#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/sysexe.c b/sw/z80/kernel/sysexe.c deleted file mode 100644 index f020b88..0000000 --- a/sw/z80/kernel/sysexe.c +++ /dev/null @@ -1,14 +0,0 @@ -#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 diff --git a/sw/z80/makefile b/sw/z80/makefile index 3d682ca..2eb4713 100644 --- a/sw/z80/makefile +++ b/sw/z80/makefile @@ -3,7 +3,10 @@ # OSNAME := helvetiOS -CSOURCES := $(wildcard kernel/*.c) $(wildcard libc/*.c) +CSOURCES := $(wildcard kernel/*.c) \ + $(wildcard kernel/drivers/*.c) \ + $(wildcard libc/*.c) + OBJECTS := $(patsubst %.c,build/%.rel,$(CSOURCES)) HEXFILE := build/$(OSNAME).hex BINARY := build/$(OSNAME).bin @@ -14,7 +17,10 @@ BINARY := build/$(OSNAME).bin CC := sdcc CFLAGS := -mz80 \ - -I kernel/include -I libc/include -DDEBUG + -I kernel/include \ + -I kernel/include/drivers \ + -I libc/include \ + -DDEBUG LDFLAGS := -mz80 --no-std-crt0 crt0.rel \ --code-loc 0x0800 --data-loc 0x8000 @@ -25,9 +31,11 @@ all: $(BINARY) # build binary $(BINARY): $(OBJECTS) dirs $(CC) $(LDFLAGS) $(OBJECTS) -o $(HEXFILE) - xxd -r -p $(HEXFILE) $(BINARY) + @# xxd -r -p $(HEXFILE) $(BINARY) + makebin -s 16384 $(HEXFILE) $(BINARY) $(OBJECTS): build/%.rel : %.c $(CSOURCES) dirs crt0.rel + @printf "\n" $(CC) $(CFLAGS) -c $< -o $@ crt0.rel: crt0.s @@ -37,9 +45,9 @@ dirs: mkdir -p build build/kernel build/libc dis: $(BINARY) - z80dasm -a -g 0h $< -o $(OSNAME).s + @# z80dasm -a -l -g 0h $< -o build/$(OSNAME).s + dz80 -b -n $< clean: - rm -rd build/* - - rm $(OSNAME).s - rm crt0.rel |