* Patch by Stephan Linz, 09 Mar 2004
- Add support for the SSV ADNP/ESC1 (Nios Softcore)
* Patch by George G. Davis, 9 Mar 2004:
fix recent build failure for SA1100 target
* Patch by Travis Sawyer, 09 Mar 2004:
Support native interrupt mode for the IBM440GX.
Previously it was running in 440GP compatibility mode.
diff --git a/doc/README.adnpesc1 b/doc/README.adnpesc1
new file mode 100644
index 0000000..1d3dff2
--- /dev/null
+++ b/doc/README.adnpesc1
@@ -0,0 +1,235 @@
+
+ SSV ADNP/ESC1 Embedded Softcore Computing
+ Nios Softcore, Altera Cyclone FPGA
+
+ Last Update: February 27, 2004
+====================================================================
+
+This file contains information regarding U-Boot and the SSV Embedded
+Nios Softcore Computing platform ADNP/ESC1. For general Nios
+information see doc/README.nios.
+
+Most stuff of this file was borrowed and based on README.dk1s10,
+the Altera DK-1S10 related information file.
+
+For those interested in contributing ... see HELP WANTED section
+in doc/README.nios.
+
+Contents:
+
+ 1. Files
+ 2. Memory Organization
+ 3. CPU Variations
+ 4. Examples
+ 5. Programming U-Boot into FLASH with GERMS
+ 6. Autoboot
+ 7. U-Boot environment convention and update philosophy
+
+====================================================================
+
+1. Files
+=========
+ board/ssv/adnpesc1/*
+ include/configs/ADNPESC1.h
+ include/configs/ADNPESC1_base_32.h
+
+
+2. Memory Organization
+=======================
+
+For the most part, you can put things pretty much anywhere.
+This is pretty flexible for Nios. So here we make some arbitrary
+choices & assume that the monitor is placed at the end of a memory
+resource. So you must make sure TEXT_BASE is chosen appropriately.
+This is very important if you plan to move your memory to another
+place as configured at this time!
+
+ -The heap is placed below the monitor (U-Boot code).
+ -Global data is placed below the heap.
+ -The stack is placed below global data (&grows down).
+
+(see doc/README.adnpesc1_base32 too)
+
+
+3. CPU Variations
+=================
+
+There are more than one NIOS CPU variation for the ADNP/ESC1 possible.
+U-Boot supports the following CPU configurations:
+
+ - SSV Basis 32 (make ADNPESC1_base_32_config)
+ - SSV Basis 32 at DNP evaluation base board 2
+ (make ADNPESC1_DNPEVA2_base_32_config)
+
+
+4. Examples
+============
+
+The hello_world example works fine. To try out you have to change
+the default load address from 0x0100_0000 to 0x0204_0000 in
+examples/Makefile (the real SDRAM for default board configuration).
+
+
+5. Programming U-Boot into FLASH with GERMS
+============================================
+
+The current version of the ADNP/ESC1 port with the default
+configuration settings occupies about 97 KBytes of flash.
+A minimal configuration occupies less than 70 KByte
+(network, SPI, POST and board command support disabled). You
+can save more memory by deactivating the Hu-Shell support and
+long command help (CFG_HUSH_PARSER, CFG_LONGHELP).
+
+To program U-Boot into the ADNP/ESC1 flash using GERMS do the
+following:
+
+1. Download U-Boot to its target run space in SDRAM:
+
+ a. Close jumper RCM_EN# and push the reset button.
+
+ b. From the command line, download U-Boot using the
+ nios-run:
+
+ $ nios-run -r u-boot.srec
+
+ NOTE: In some cases this want fail. I don't know why,
+ but try again.
+
+This takes about 1 minute (GERMS is not very speedy here).
+After u-boot is downloaded it will be executed. You should
+see the following:
+
+ U-Boot 1.0.2 (Jan 30 2004 - 12:59:15)
+
+ CPU: Nios-32 Rev. 3.3 (0x3038)
+ Reg file size: 512 LO_LIMIT/HI_LIMIT: 1/30
+ Board: SSV DilNetPC ADNP/ESC1
+ Conf.: SSV Base 32 (nios_32)
+ In: serial
+ Out: serial
+ Err: serial
+ ADNPESC1 >
+
+
+2. Quit nios-run and start your terminal application (e.g. start
+ Hyperterminal or minicom).
+
+3. Download the u-boot code to RAM. When using Hyperterminal, do the
+ following:
+
+ a. From the u-boot command prompt start a binary download to SDRAM:
+
+ at the SSV Basis 32 to SDRAM:
+
+ ==> loadb 2000100
+
+ b. Download u-boot.bin using kermit.
+
+4. From the U-Boot command prompt, erase flash:
+
+ at the SSV Basis 32 from 0x1000000 to 0x103ffff:
+
+ ==> protect off 1:0-3
+ ==> erase 1:0-3
+
+5. Copy the binary image from SDRAM to flash:
+
+ at the SSV Basis 32 from SDRAM:
+
+ ==> cp.b 2000100 1000000 $filesize
+
+U-Boot will now automatically start when the board is powered on or
+reset using the SSV Basis 32 configuration without closed RCM jumper.
+To start U-Boot with closed RCM Jumper, enter the following GERMS
+command:
+
+ + g 1000000
+
+
+6. Autoboot
+===========
+
+U-Boot will try to boot a valid Nios application from Flash. For this
+it will use the deposited Hu-Shell script in environment variable
+'bootcmd' which is looking for a valid Nios application identifier
+string in Flash and go on at even its entry address. For more
+information see the next chapter.
+
+
+7. U-Boot environment convention and update philosophy
+======================================================
+
+U-Boot for the SSV ADNP/ESC1 target knows about many environment
+variables used to control the startup process, update process for
+raw Nios applications, and optionally file system image updates.
+In default configuration there are two Hu-Shell scripts to update
+the Nios application and/or the file system image:
+
+1. Update Nios application (ex. the uCLinux kernel):
+
+ run 'appl_update'
+
+2. Update optional file system image (ex. RomFS image used by uCLinux):
+
+ run 'fs_update'
+
+The Nios application can be any programm code generated in relation
+to the Nios application identifier -- the string "Nios" at offset
+address 0x0c. To use the scripts like described above in a secure way
+you have to check-up the next environment variables:
+
+1. update_allowed
+
+ - Update switch -- must be set to '1' (one) to allow any update
+ - default is '0' (zero)
+
+ NOTE: You should avoid to save this variable with non zero
+ value to Flash. Otherwise it would be allow any
+ update process at any time!
+
+2. appl_entry_addr
+
+ - Nios application area start address (usually in Flash)
+ - this is the startup address for autoboot
+ - each Nios application code we want to update will be copied
+ to this address
+ - default is CFG_ADNPESC1_NIOS_APPL_ENTRY
+
+3. appl_end_addr
+
+ - Nios application area end address (usually in Flash)
+ - will be used to unprotect/erase the Flash area while updating
+ - default is CFG_ADNPESC1_NIOS_APPL_END
+
+4. appl_ident_addr
+
+ - address of the Nios application identification string
+ - this is the address checked-up by autoboot
+ - default is CFG_ADNPESC1_NIOS_APPL_IDENT
+
+5. appl_ident_str
+
+ - the Nios application identification string itself
+ - default is CFG_ADNPESC1_NIOS_IDENTIFIER
+
+6. appl_name
+
+ - name of file we have to download/update
+ - default is ADNPESC1/base32/linux.bin
+
+7. fs_base_addr
+
+ - optionally file system area start address (usually in Flash)
+ - each file system we want to update will be copied to this address
+ - default is CFG_ADNPESC1_FILESYSTEM_BASE
+
+8. fs_end_addr
+
+ - optionally file system area end address (usually in Flash)
+ - will be used to unprotect/erase the Flash area while updating
+ - default is CFG_ADNPESC1_FILESYSTEM_END
+
+9. fs_name
+
+ - name of file we have to download/update
+ - default is ADNPESC1/base32/romfs.img
diff --git a/doc/README.adnpesc1_base32 b/doc/README.adnpesc1_base32
new file mode 100644
index 0000000..6576044
--- /dev/null
+++ b/doc/README.adnpesc1_base32
@@ -0,0 +1,469 @@
+
+TODO: specify IDE i/f
+
+
+===============================================================================
+ C P U , M E M O R Y , I N / O U T C O M P O N E N T S
+===============================================================================
+see also [1]-[5]
+
+CPU: "DNP_ESC1"
+ 32 bit NIOS for 50 MHz
+ 512 Byte for register file (30 levels)
+ with out instruction cache
+ with out data cache
+ 2 KByte On Chip ROM with GERMS boot monitor
+ with out On Chip RAM
+ MSTEP multiplier
+ no Debug Core
+ no On Chip Instrumentation (OCI)
+
+ U-Boot CFG: CFG_NIOS_CPU_CLK = 50000000
+ CFG_NIOS_CPU_ICACHE = (not present)
+ CFG_NIOS_CPU_DCACHE = (not present)
+ CFG_NIOS_CPU_REG_NUMS = 512
+ CFG_NIOS_CPU_MUL = 0
+ CFG_NIOS_CPU_MSTEP = 1
+ CFG_NIOS_CPU_DBG_CORE = 0
+
+IRQ: Nr. | used by
+ ------+--------------------------------------------------------
+ 16 | TIMER0 | CFG_NIOS_CPU_TIMER0_IRQ = 16
+ 17 | UART0 | CFG_NIOS_CPU_UART0_IRQ = 17
+ 18 | UART1 | CFG_NIOS_CPU_UART1_IRQ = 18
+ 20 | LAN91C111 | CFG_NIOS_CPU_LAN0_IRQ =
+ | PIO6 | CFG_NIOS_CPU_PIO6_IRQ = 20
+ 25 | SPI0 | CFG_NIOS_CPU_SPI0_IRQ = 25
+ 31 | PIO7 | CFG_NIOS_CPU_PIO7_IRQ = 31
+ 32 | PIO8 | CFG_NIOS_CPU_PIO8_IRQ = 32
+ 33 | PIO9 | CFG_NIOS_CPU_PIO9_IRQ = 33
+ 34 | PIO10 | CFG_NIOS_CPU_PIO10_IRQ = 34
+ 35 | PIO11 | CFG_NIOS_CPU_PIO11_IRQ = 35
+ 36 | PIO12 | CFG_NIOS_CPU_PIO12_IRQ =
+ | IDE0 | CFG_NIOS_CPU_IDE0_IRQ = 36
+ 37 | PIO13 | CFG_NIOS_CPU_PIO13_IRQ =
+ | IDE1 | CFG_NIOS_CPU_IDE1_IRQ = 37
+
+MEMORY: 8 MByte Flash
+ 16 MByte SDRAM
+
+Timer: TIMER0: high priority programmable timer (IRQ16)
+
+ U-Boot CFG: CFG_NIOS_CPU_TICK_TIMER = 0
+ CFG_NIOS_CPU_USER_TIMER = (not present)
+
+PIO: Nr. | description
+ ------+--------------------------------------------------------
+ PIO0 | PORTA: 8 in/outputs for general purpose usage
+ PIO1 | PORTB: 8 in/outputs for general purpose usage
+ PIO2 | PORTC: 4 in/outputs for general purpose usage
+ PIO3 | RCM: 1 input for RCM_EN# jumper (Req.Conf.Mon.)
+ PIO4 | WDTENA: 1 output to enable the on-board watchdog
+ PIO5 | WDTTRIG: 1 output to trigger the on-board watchdog
+ PIO6 | LAN0INT: 1 input for LAN91C111 irq input (IRQ20)
+ PIO7 | INT1: 1 input for general purpose irq (IRQ31)
+ PIO8 | INT2: 1 input for general purpose irq (IRQ32)
+ PIO9 | INT3: 1 input for general purpose irq (IRQ33)
+ PIO10| INT4: 1 input for general purpose irq (IRQ34)
+ PIO11| INT5: 1 input for general purpose irq (IRQ35)
+ PIO12| INT6: 1 input for general purpose irq (IRQ36)
+ | IDE0INT: (same) for IDE0 irq input
+ PIO13| INT7: 1 input for general purpose irq (IRQ37)
+ | IDE1INT: (same) for IDE1 irq input
+
+ U-Boot CFG: CFG_NIOS_CPU_PORTA_PIO = 0
+ CFG_NIOS_CPU_PORTB_PIO = 1
+ CFG_NIOS_CPU_PORTC_PIO = 2
+ CFG_NIOS_CPU_RCM_PIO = 3
+ CFG_NIOS_CPU_WDTENA_PIO = 4
+ CFG_NIOS_CPU_WDTTRIG_PIO = 5
+ CFG_NIOS_CPU_LED_PIO = (not present)
+
+UART: UART0: fixed baudrate of 115200, fixed protocol 8N1, RTS/CTS (IRQ17)
+ UART1: fixed baudrate of 115200, fixed protocol 8N1,
+ without handshake RTS/CTS (IRQ18)
+
+SPI: SPI0: master capable, 1 slave selectable, 250kHz target clock,
+ 2 usec targets delay between slave select and clock,
+ data is transferred MSB-first / LSB-last (IRQ25)
+
+LAN: SMsC LAN91C111 with:
+ - without offset
+ - data bus width 16 bit (on-board hard wired at 32 bit bus)
+ - !!! 32 bit bus access --> each address * 2 !!!
+
+IDE: (TODO)
+
+
+===============================================================================
+ M E M O R Y M A P
+===============================================================================
+
+- - - - - - - - - - - external extension - - - - - - - - - - - - - - - - - - -
+
+ 0x44000000 ---32-----------16|15------------0-
+ | | | \
+ : (real size : : |
+ EXT3 (CS4) : and content : : > CFG_NIOS_CPU_CS3_SIZE
+ : unknown) : : | = 0x01000000
+ | | | /
+ 0x43000000 ---32-----------16|15------------0- CFG_NIOS_CPU_CS3_BASE
+ | | | \
+ : (real size : : |
+ EXT2 (CS3) : and content : : > CFG_NIOS_CPU_CS2_SIZE
+ : unknown) : : | = 0x01000000
+ | | | /
+ 0x42000000 ---32-----------16|15------------0- CFG_NIOS_CPU_CS2_BASE
+ | | | \
+ : (real size : : |
+ EXT1 (CS2) : and content : : > CFG_NIOS_CPU_CS1_SIZE
+ : unknown) : : | = 0x01000000
+ | | | /
+ 0x41000000 ---32-----------16|15------------0- CFG_NIOS_CPU_CS1_BASE
+ | | | \
+ : (real size : : |
+ EXT0 (CS1) : and content : : > CFG_NIOS_CPU_CS0_SIZE
+ : unknown) : : | = 0x01000000
+ | | | /
+ 0x40000000 ---32-----------16|15------------0- CFG_NIOS_CPU_CS0_BASE
+ | |
+ : gap :
+ : :
+
+- - - - - - - - - - - external memory - - - - - - - - - - - - - - - - - - -
+
+ : :
+ : gap :
+ | |
+ 0x03000000 ---32-----------16|15------------0- CFG_NIOS_CPU_STACK
+ | . | \
+ | . | | (U-Boot run-time system)
+ | . | |
+ | . | > CFG_MONITOR_LEN
+ | . | | = 0x00040000
+ | . | |
+ | . | /
+ 0x02fc0000 --+32-----------16|15------------0+ TEXT_BASE
+ | . | \
+ | . | > CFG_MALLOC_LEN (heap)
+ | . | /
+ --+32-----------16|15------------0+
+ | . | \
+ | . | > CFG_GBL_DATA_SIZE (global)
+ | . | /
+ --+32-----------16|15------------0+ CFG_INIT_SP (u-boot stack)
+ | . | \ \
+ | . | | |
+ | . | | > stack area
+ | . | | |
+ | . | | V
+ | . | |
+ | . | |
+ SDRAM | . | > CFG_NIOS_CPU_SDRAM_SIZE
+ | . | | = 0x01000000
+ | . | |
+ 0x02000100 |- - - - - - - - - - - - - - - -+-|-
+ | . | | \
+ | . | | |
+ | . | | > CFG_NIOS_CPU_VEC_SIZE
+ | . | | | = 0x00000100
+ | | / /
+ 0x02000000 |- - - - - - - - - - - - - - - -+- - CFG_NIOS_CPU_VEC_BASE
+ 0x02000000 ---32-----------16|15------------0- CFG_NIOS_CPU_SDRAM_BASE
+ | | \
+ : gap : > (space for 2nd Flash)
+ | | /
+ 0x01800000 ---32-----------16|15------------0-
+ | sector 127 | \
+ + 0x7f0000 |- - - - - - - - - - - - - - - -| |
+ | : | |
+ Flash |- - - - : - - - -| > CFG_NIOS_CPU_FLASH_SIZE
+ | sector 1 : | | = 0x00800000
+ + 0x010000 |- - - - - - - - - - - - - - - -| |
+ | sector 0 (size = 0x10000) | /
+ 0x01000000 ---8-------------4|3-------------0- CFG_NIOS_CPU_FLASH_BASE
+ | |
+ : gap :
+ : :
+
+- - - - - - - - - - - external i/o - - - - - - - - - - - - - - - - - - -
+
+ : :
+ : gap :
+ | |
+ 0x00010020 ---32-----------16|15------------0-
+ | | \
+ | register bank | |
+ | size = (real_size << 1) | |
+ | real_size = 0x10 | |
+ | +--------.---.---.--- | |
+ | | bank 0 \ 1 \ 2 \ 3 \ | |
+ | |---------------------------+ | |
+ LAN91C111 | | BANK | RESERVED | | > na_enet_size
+ | |- - - - - - -|- - - - - - -| | | = 0x00000020
+ | | RPCR | MIR | | |
+ | |- - - - - - -|- - - - - - -| | |
+ | | COUNTER | RCR | | |
+ | |- - - - - - -|- - - - - - -| | |
+ | | EPH STATUS | TCR | | |
+ | +---------------------------+ | /
+ 0x00010000 ---32-----------16|15------------0- CFG_NIOS_CPU_LAN0_BASE
+ | |
+ : gap :
+ : :
+
+- - - - - - - - - - - on chip i/o - - - - - - - - - - - - - - - - - - -
+
+ : :
+ : gap :
+ | |
+ 0x00001040 ---32-----------16|15------------0-
+ | | | \
+ : : : |
+ IDE1 i/f : : : > 0x00000020
+ [5] : : : |
+ | | | /
+ 0x00001020 ---32-----------16|15------------0- CFG_NIOS_CPU_IDE1
+ | | | \
+ : : : |
+ IDE0 i/f : : : > 0x00000020
+ [5] : : : |
+ | | | /
+ 0x00001000 ---32-----------16|15------------0- CFG_NIOS_CPU_IDE0
+ | |
+ : gap :
+ | |
+ 0x00000980 ---32-----------16|15------------0-
+ | edgecapture (1 bit) (rw) | \
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ PIO13 | interruptmask (1 bit) (rw) | |
+ [3] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
+ | (unused) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | data (1 bit) (ro) | /
+ 0x00000970 ---32-----------16|15------------0- CFG_NIOS_CPU_PIO13
+ | edgecapture (1 bit) (rw) | \
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ PIO12 | interruptmask (1 bit) (rw) | |
+ [3] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
+ | (unused) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | data (1 bit) (ro) | /
+ 0x00000960 ---32-----------16|15------------0- CFG_NIOS_CPU_PIO12
+ | edgecapture (1 bit) (rw) | \
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ PIO11 | interruptmask (1 bit) (rw) | |
+ [3] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
+ | (unused) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | data (1 bit) (ro) | /
+ 0x00000950 ---32-----------16|15------------0- CFG_NIOS_CPU_PIO11
+ | edgecapture (1 bit) (rw) | \
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ PIO10 | interruptmask (1 bit) (rw) | |
+ [3] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
+ | (unused) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | data (1 bit) (ro) | /
+ 0x00000940 ---32-----------16|15------------0- CFG_NIOS_CPU_PIO10
+ | edgecapture (1 bit) (rw) | \
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ PIO9 | interruptmask (1 bit) (rw) | |
+ [3] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
+ | (unused) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | data (1 bit) (ro) | /
+ 0x00000930 ---32-----------16|15------------0- CFG_NIOS_CPU_PIO9
+ | edgecapture (1 bit) (rw) | \
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ PIO8 | interruptmask (1 bit) (rw) | |
+ [3] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
+ | (unused) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | data (1 bit) (ro) | /
+ 0x00000920 ---32-----------16|15------------0- CFG_NIOS_CPU_PIO8
+ | edgecapture (1 bit) (rw) | \
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ PIO7 | interruptmask (1 bit) (rw) | |
+ [3] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
+ | (unused) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | data (1 bit) (ro) | /
+ 0x00000910 ---32-----------16|15------------0- CFG_NIOS_CPU_PIO7
+ | edgecapture (1 bit) (rw) | \
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ PIO6 | interruptmask (1 bit) (rw) | |
+ [3] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
+ | (unused) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | data (1 bit) (ro) | /
+ 0x00000900 ---32-----------16|15------------0- CFG_NIOS_CPU_PIO6
+ | |
+ : gap :
+ | |
+ 0x000008e0 ---32-----------16|15------------0-
+ | (unused) | \
+ + 0x1c |- - - - - - - - - - - - - - - -| |
+ | endofpacket (16 bit) (rw) | |
+ + 0x18 |- - - - - - - - - - - - - - - -| |
+ | slaveselect (1 bit) (rw) | |
+ + 0x14 |- - - - - - - - - - - - - - - -| |
+ SPI0 | (reserved) | |
+ [4] + 0x10 |- - - - - - - - - - - - - - - -| > 0x00000020
+ | control (11 bit) (rw) | |
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ | status (9 bit) (rw) | |
+ + 0x08 |- - - - - - - - - - - - - - - -| |
+ | txdata (16 bit) (wo) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | rxdata (16 bit) (ro) | /
+ 0x000008c0 ---32-----------16|15------------0- CFG_NIOS_CPU_SPI0
+ | (unused) | \
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ PIO5 | (unused) | |
+ [3] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
+ | (unused) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | data (1 bit) (wo) | /
+ 0x000008b0 ---32-----------16|15------------0- CFG_NIOS_CPU_PIO5
+ | (unused) | \
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ PIO4 | (unused) | |
+ [3] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
+ | (unused) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | data (1 bit) (wo) | /
+ 0x000008a0 ---32-----------16|15------------0- CFG_NIOS_CPU_PIO4
+ | (unused) | \
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ PIO3 | (unused) | |
+ [3] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
+ | (unused) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | data (1 bit) (ro) | /
+ 0x00000890 ---32-----------16|15------------0- CFG_NIOS_CPU_PIO3
+ | (unused) | \
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ PIO2 | (unused) | |
+ [3] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
+ | direction (4 bit) (rw) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | data (4 bit) (rw) | /
+ 0x00000880 ---32-----------16|15------------0- CFG_NIOS_CPU_PIO2
+ | (unused) | \
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ PIO1 | (unused) | |
+ [3] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
+ | direction (8 bit) (rw) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | data (8 bit) (rw) | /
+ 0x00000870 ---32-----------16|15------------0- CFG_NIOS_CPU_PIO1
+ | (unused) | \
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ PIO0 | (unused) | |
+ [3] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
+ | direction (8 bit) (rw) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | data (8 bit) (rw) | /
+ 0x00000860 ---32-----------16|15------------0- CFG_NIOS_CPU_PIO0
+ | (unused) | \
+ + 0x1c |- - - - - - - - - - - - - - - -| |
+ | (unused) | |
+ + 0x18 |- - - - - - - - - - - - - - - -| |
+ | snaph (16 bit) (rw) | |
+ + 0x14 |- - - - - - - - - - - - - - - -| |
+ TIMER0 | snapl (16 bit) (rw) | |
+ [2] + 0x10 |- - - - - - - - - - - - - - - -| > 0x00000020
+ | periodh (16 bit) (rw) | |
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ | periodl (16 bit) (rw) | |
+ + 0x08 |- - - - - - - - - - - - - - - -| |
+ | control (4 bit) (rw) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | status (2 bit) (rw) | /
+ 0x00000840 ---32-----------16|15------------0- CFG_NIOS_CPU_TIMER0
+ | (unused) | \
+ + 0x1c |- - - - - - - - - - - - - - - -| |
+ | (unused) | |
+ + 0x18 |- - - - - - - - - - - - - - - -| |
+ | (unused) | |
+ + 0x14 |- - - - - - - - - - - - - - - -| |
+ UART1 | (unused) | > 0x00000020
+ [1] + 0x10 |- - - - - - - - - - - - - - - -| |
+ | control (10 bit) (rw) | |
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ | status (10 bit) (rw) | |
+ + 0x08 |- - - - - - - - - - - - - - - -| |
+ | txdata (8 bit) (wo) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | rxdata (8 bit) (ro) | /
+ 0x00000820 ---32-----------16|15------------0- CFG_NIOS_CPU_UART1
+ | (unused) | \
+ + 0x1c |- - - - - - - - - - - - - - - -| |
+ | (unused) | |
+ + 0x18 |- - - - - - - - - - - - - - - -| |
+ | (unused) | |
+ + 0x14 |- - - - - - - - - - - - - - - -| |
+ UART0 | (unused) | > 0x00000020
+ [1] + 0x10 |- - - - - - - - - - - - - - - -| |
+ | control (10 bit) (rw) | |
+ + 0x0c |- - - - - - - - - - - - - - - -| |
+ | status (10 bit) (rw) | |
+ + 0x08 |- - - - - - - - - - - - - - - -| |
+ | txdata (8 bit) (wo) | |
+ + 0x04 |- - - - - - - - - - - - - - - -| |
+ | rxdata (8 bit) (ro) | /
+ 0x00000800 ---32-----------16|15------------0- CFG_NIOS_CPU_UART0
+
+- - - - - - - - - - - on chip memory 1 - - - - - - - - - - -
+
+ 0x00000800 ---32-----------16|15------------0-
+ | : | \
+ | : | |
+ GERMS | : | > CFG_NIOS_CPU_ROM_SIZE
+ | : | | = 0x00000800
+ | : | /
+ 0x00000000 |- - - - - - - - - - - - - - - -+- - CFG_NIOS_CPU_RST_VECT
+ 0x00000000 ---32-----------16|15------------0- CFG_NIOS_CPU_ROM_BASE
+
+
+===============================================================================
+ F L A S H M E M O R Y A L L O C A T I O N
+===============================================================================
+
+ 0x01800000 ---8-------------4|3-------------0-
+ | : | \
+ | : | |
+ | : | > 6 MByte ROM FS
+ | : | |
+ | : | /
+ 0x01200000 --+- - - - - - - -:- - - - - - - -+- - file system image(s)
+ | : | \
+ | : | |
+ | : | > 1728 kByte ucLinux
+ | : | |
+ | : | /
+ 0x01050000 --+- - - - - - - -:- - - - - - - -+- - os image(s)
+ | : | \
+ 0x01040000 --+- - - - - - - -:- - - - - - - -+-|- u-boot environment
+ | : | |
+ | : | > 320 kByte U-Boot
+ | : | |
+ | : | |
+ | : | /
+ 0x01000000 --+- - - - - - - -:- - - - - - - -+- - u-boot _start()
+ 0x01000000 ---8-------------4|3-------------0-
+
+
+===============================================================================
+ R E F E R E N C E S
+===============================================================================
+[1] http://www.altera.com/literature/ds/ds_nios_uart.pdf
+[2] http://www.altera.com/literature/ds/ds_nios_timer.pdf
+[3] http://www.altera.com/literature/ds/ds_nios_pio.pdf
+[4] http://www.altera.com/literature/ds/ds_nios_spi.pdf
+[5] http://www.t13.org/index.html
+
+
+===============================================================================
+Stephan Linz <linz@li-pro.net>