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git://projects.qi-hardware.com/iris.git
synced 2025-04-21 12:27:27 +03:00
start nand-boot; wrap startup
This commit is contained in:
Bas Wijnen
@@ -17,7 +17,22 @@
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start_load = 0xa0600000
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load = 0x80000000
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#UDC_BOOT = comment this out for nand boot
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UDC_BOOT = comment this out for nand boot
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ifdef UDC_BOOT
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boot_threads = $(standard_boot_programs) $(udc_boot_programs)
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threadlist = mips/nanonote/threadlist-udc
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ARCH_CXXFLAGS = -DNUM_THREADS=2
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all: mips/nanonote/nand-boot.raw test
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else
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boot_threads = $(standard_boot_programs) $(sd_boot_programs)
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threadlist = mips/nanonote/threadlist-sd
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ARCH_CXXFLAGS = -DNUM_THREADS=4
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all: mips/nanonote/nand-boot.raw iris-sd.tar
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iris-sd.tar: $(addprefix fs/,$(addsuffix .elf,$(programs))) mips/start.raw.gz fs/init.config
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mkimage -A mips -T kernel -a $(start_load) -e a$(shell /bin/sh -c '$(OBJDUMP) -t mips/start.elf | grep __start$$ | cut -b2-8') -n Iris -d mips/start.raw.gz fs/uimage | sed -e 's/:/;/g'
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cd fs && tar cvf ../$@ uimage init.config $(addsuffix .elf,$(programs)) --dereference
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endif
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ARCH_CPPFLAGS = -I. -Imips -Imips/nanonote -Wa,-mips32 -DNANONOTE -DUSE_SERIAL
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CROSS = mipsel-linux-gnu-
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@@ -26,6 +41,9 @@ junk = mdebug.abi32 reginfo comment pdr
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OBJCOPYFLAGS = $(addprefix --remove-section=.,$(junk))
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iris.elf: LDFLAGS = --omagic -Ttext $(load)
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mips/start.elf: LDFLAGS = --omagic -Ttext $(start_load)
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mips/nanonote/nand-boot.elf: LDFLAGS = --omagic -Ttext 0x80000000
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source/nand.o: mips/nanonote/nand-boot.raw
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arch_iris_sources = mips/interrupts.cc mips/arch.cc
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boot_sources = mips/init.cc mips/nanonote/board.cc
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@@ -34,22 +52,7 @@ udc_boot_programs = udc
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sd_boot_programs = sd+mmc partition fat
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standard_boot_programs = bootinit
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programs = init gpio lcd bsquare ball buzzer metronome elfrun alarm gui nand test $(udc_boot_programs) $(sd_boot_programs) $(standard_boot_programs)
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ifdef UDC_BOOT
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boot_threads = $(standard_boot_programs) $(udc_boot_programs)
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threadlist = mips/nanonote/threadlist-udc
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ARCH_CXXFLAGS = -DNUM_THREADS=2
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all: test
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else
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boot_threads = $(standard_boot_programs) $(sd_boot_programs)
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threadlist = mips/nanonote/threadlist-sd
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ARCH_CXXFLAGS = -DNUM_THREADS=4
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all: iris-sd.tar
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iris-sd.tar: $(addprefix fs/,$(addsuffix .elf,$(programs))) mips/start.raw.gz fs/init.config
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mkimage -A mips -T kernel -a $(start_load) -e a$(shell /bin/sh -c '$(OBJDUMP) -t mips/start.elf | grep __start$$ | cut -b2-8') -n Iris -d mips/start.raw.gz fs/uimage | sed -e 's/:/;/g'
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cd fs && tar cvf ../$@ uimage init.config $(addsuffix .elf,$(programs)) --dereference
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endif
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programs = init gpio lcd bsquare ball buzzer metronome elfrun alarm rtc gui nand test $(udc_boot_programs) $(sd_boot_programs) $(standard_boot_programs)
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mips/start.o:mips/start.S Makefile Makefile.arch iris.raw
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$(CC) $(CPPFLAGS) -DSTART=0xa$(shell /bin/sh -c '$(OBJDUMP) -t iris.elf | grep __start$$ | cut -b2-8') -c $< -o $@
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@@ -94,3 +94,22 @@ void arch_reboot ():
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wdt_start ()
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// Wait for wdt to trigger reboot.
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while true:
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void arch_poweroff ():
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// Wait for serial port to be done.
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while !(UART0_LSR & UARTLSR_TEMT):
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// Power off.
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// Make sure the rtc is running.
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cpm_start_rtc ()
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while !rtc_write_ready ():
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rtc_enabled ()
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while !rtc_write_ready ():
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rtc_power_down ()
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// Wait for power down to work.
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while !rtc_write_ready ():
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// Delay a bit more.
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for unsigned i = 0; i < 1000; ++i:
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gpio_set (0, 0)
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// Fall back to reboot.
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kdebug ("Power down failed! Rebooting instead.\n")
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arch_reboot ()
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@@ -117,7 +117,7 @@ static void __map_io (unsigned physical, unsigned mapping):
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#define map_intc() do { __map_io (INTC_PHYSICAL, INTC_BASE); } while (0)
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#define map_tcu() do { __map_io (TCU_PHYSICAL, TCU_BASE); } while (0)
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#define map_wdt() do { __map_io (WDT_PHYSICAL, WDT_BASE); } while (0)
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#define map_rtc() do { __map_io (RTC_PHYSICAL, RTC_BASE); } while (1)
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#define map_rtc() do { __map_io (RTC_PHYSICAL, RTC_BASE); } while (0)
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#define map_gpio() do { __map_io (GPIO_PHYSICAL, GPIO_BASE); } while (0)
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#define map_aic() do { __map_io (AIC_PHYSICAL, AIC_BASE); } while (0)
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#define map_msc() do { __map_io (MSC_PHYSICAL, MSC_BASE); } while (0)
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207
mips/nanonote/nand-boot.ccp
Normal file
207
mips/nanonote/nand-boot.ccp
Normal file
@@ -0,0 +1,207 @@
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#pypp 0
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// Iris: micro-kernel for a capability-based operating system.
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// mips/nanonote/nand-boot.ccp: standalone program for booting from nand.
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// Copyright 2010 Bas Wijnen <wijnen@debian.org>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// The following defines are taken from mtd/nand.h in the Linux source.
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asm volatile ("\t.set noreorder\n"
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"\t.text\n"
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"\t.globl __start\n"
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"\t.word ~0\n"
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"__start:\n"
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"\tbal 1f\n"
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"__hack_label:\n"
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"\tnop\n"
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"\t.word _gp\n"
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"1:\n"
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"\tlw $gp, 0($ra)\n"
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"\tla $sp, stack + 0x1000\n"
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"\tla $t9, nandboot_start\n"
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"\tjr $t9\n"
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"\tnop\n"
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"\t.set reorder")
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#define __KERNEL__
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#include <jz4740.hh>
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// Standard NAND flash commands
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#define CMD_READ0 0
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#define CMD_READ1 1
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#define CMD_RNDOUT 5
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#define CMD_PAGEPROG 0x10
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#define CMD_READOOB 0x50
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#define CMD_ERASE1 0x60
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#define CMD_STATUS 0x70
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#define CMD_STATUS_MULTI 0x71
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#define CMD_SEQIN 0x80
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#define CMD_RNDIN 0x85
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#define CMD_READID 0x90
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#define CMD_ERASE2 0xd0
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#define CMD_RESET 0xff
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// Extended commands for large page devices
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#define CMD_READSTART 0x30
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#define CMD_RNDOUTSTART 0xE0
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#define CMD_CACHEDPROG 0x15
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// Status bits
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#define STATUS_FAIL 0x01
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#define STATUS_FAIL_N1 0x02
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#define STATUS_TRUE_READY 0x20
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#define STATUS_READY 0x40
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#define STATUS_WP 0x80
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static volatile char *command
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static volatile char *address
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static volatile char *data
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static unsigned page_bits
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static unsigned redundant_bits
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static unsigned block_bits
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static unsigned word_size
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static void unbusy ():
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while !(gpio_get_port (2) & (1 << 30)):
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// Do nothing.
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// Delay.
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for unsigned i = 0; i < 1000; ++i:
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gpio_set (0, 0)
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static void addr (unsigned d):
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unbusy ()
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*address = d
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unbusy ()
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static void cmd (unsigned d):
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unbusy ()
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*command = d
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unbusy ()
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static void wdata (unsigned d):
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unbusy ()
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*data = d
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unbusy ()
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static unsigned rdata ():
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unbusy ()
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unsigned ret = *data
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unbusy ()
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return ret
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// Reset nand controller.
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static void reset ():
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unsigned base = 0xa0000000 + 0x18000000
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data = (volatile char *)base
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command = (volatile char *)(base + 0x8000)
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address = (volatile char *)(base + 0x10000)
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// Set up.
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gpio_as_nand ()
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EMC_NFCSR = EMC_NFCSR_NFE1 | EMC_NFCSR_NFCE1
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// Reset nand.
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cmd (CMD_RESET)
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cmd (CMD_READID)
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addr (0)
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unsigned d = rdata ()
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//unsigned maker = d
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d = rdata ()
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//unsigned device = d
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d = rdata ()
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//unsigned internal_chip_number = 1 << (d & 0x3)
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//unsigned cell_type = 2 << ((d >> 2) & 0x3)
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//unsigned simultaneously_programmed_pages = 1 << ((d >> 4) & 0x3)
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//bool can_interleave_program_between_chips = d & 0x40
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//bool can_cache_program = d & 0x80
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d = rdata ()
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page_bits = 10 + (d & 3)
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redundant_bits = (d & 4 ? 4 : 3)
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block_bits = 16 + ((d >> 4) & 3)
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word_size = (d & 0x40 ? 16 : 8)
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//unsigned serial_access_minimum = (d & 0x80 ? 25 : 50)
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d = rdata ()
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//unsigned num_planes = 1 << ((d >> 2) & 3)
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//unsigned plane_bits = 26 + ((d >> 4) & 7)
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// Read 512 bytes from nand and store them into buffer. a must be aligned.
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// Return value is true if the oob claims there is valid data.
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static bool read (unsigned a, char *buffer):
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unsigned column = a & ((1 << page_bits) - 1)
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unsigned row = a >> page_bits
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cmd (CMD_READ0)
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addr (column)
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addr (column >> 8)
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addr (row)
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addr (row >> 8)
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addr (row >> 16)
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cmd (CMD_READSTART)
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EMC_NFECR = EMC_NFECR_ECCE | EMC_NFECR_RS | EMC_NFECR_RS_DECODING | EMC_NFECR_ERST
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for unsigned t = 0; t < 0x200; ++t:
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buffer[t] = rdata ()
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EMC_NFECR = EMC_NFECR_RS | EMC_NFECR_RS_DECODING
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char error[9]
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// Spare space (starts at 1 << page_bits)
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// 0: unused
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// 2: detect valid data (at least 1 byte == 0 means valid)
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// 5: unused
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// 6: 9-byte ecc of 1st 512 bytes
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// 15: 9-byte ecc of 2nd 512 bytes
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// 24: 9-byte ecc of 3rd 512 bytes
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// 33: 9-byte ecc of 4th 512 bytes
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// 42: unused
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// 64: end of space
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unsigned validcol = (1 << page_bits) + 2
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bool valid = false
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cmd (CMD_RNDOUT)
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addr (validcol)
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addr (validcol >> 8)
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cmd (CMD_RNDOUTSTART)
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for unsigned t = 0; t < 3; ++t:
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valid = rdata () == 0 || valid
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unsigned errcol = (1 << page_bits) + (column >> 9) * 9 + 6
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cmd (CMD_RNDOUT)
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addr (errcol)
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addr (errcol >> 8)
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cmd (CMD_RNDOUTSTART)
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for unsigned t = 0; t < 9; ++t:
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error[t] = rdata ()
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EMC_NFPAR (0) = ((unsigned *)error)[0]
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EMC_NFPAR (1) = ((unsigned *)error)[1]
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EMC_NFPAR (2) = error[9]
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EMC_NFECR = EMC_NFECR_ECCE | EMC_NFECR_RS | EMC_NFECR_RS_DECODING | EMC_NFECR_PRDY
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while !(EMC_NFINTS & EMC_NFINTS_DECF):
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// Do nothing.
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unsigned errs = (EMC_NFINTS & EMC_NFINTS_ERRCNT_MASK) >> EMC_NFINTS_ERRCNT_BIT
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for unsigned i = 0; i < errs; ++i:
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buffer[EMC_NFERR (i) >> 16] ^= EMC_NFERR (i) & 0xff
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extern "C":
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void nandboot_start ():
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reset ()
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// Load contents of nand flash (from 0x4000) into 0xa0600000;
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unsigned a = 0x4000
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unsigned target = 0xa0600000
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while read (a, (char *)target):
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a += 0x200
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target += 0x200
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// Then jump to 0xa0600000.
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return ((void (*)())0xa0600000) ()
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unsigned char stack[0x1000]
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unsigned __gxx_personality_v0
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