lupyuen/nuttx-sg2000
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Lee Lup Yuen 2024-05-07 23:05:03 +08:00
parent 85c2d53aa4
commit b40d92d180
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README.md
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@ -322,7 +322,10 @@ fdt addr ${fdt_addr_r}
## ramdisk_addr_r=0x81600000
## ramdisk_size=0x1000000
## fdt_addr_r=0x81200000
booti ${kernel_addr_r} ${ramdisk_addr_r}:${ramdisk_size} ${fdt_addr_r}
booti ${kernel_addr_r} - ${fdt_addr_r}
## For Linux: We need the RAM Disk Address
## booti ${kernel_addr_r} ${ramdisk_addr_r}:${ramdisk_size} ${fdt_addr_r}
```
_What happens when we run it at the U-Boot Command Prompt?_
@ -378,7 +381,7 @@ Loading: #################################################################
done
Bytes transferred = 8354816 (7f7c00 hex)
$ booti ${kernel_addr_r} ${ramdisk_addr_r}:${ramdisk_size} ${fdt_addr_r}
$ booti ${kernel_addr_r} - ${fdt_addr_r}
## Flattened Device Tree blob at 81200000
Booting using the fdt blob at 0x81200000
Loading Ramdisk to 9e27f000, end 9f27f000 ... OK
@ -623,21 +626,24 @@ Bytes transferred = 50235 (c43b hex)
## TODO: NuttX doesn't need the Device Tree. Remove this.
$ fdt addr ${fdt_addr_r}
## Boot NuttX from RAM
$ booti ${kernel_addr_r} ${ramdisk_addr_r}:${ramdisk_size} ${fdt_addr_r}
## Boot NuttX from RAM. RAM Disk Address must be `-`!
$ booti ${kernel_addr_r} - ${fdt_addr_r}
## For Linux: We need the RAM Disk Address
## booti ${kernel_addr_r} ${ramdisk_addr_r}:${ramdisk_size} ${fdt_addr_r}
```
Or in a single line...
```bash
setenv tftp_server 192.168.31.10 ; dhcp ${kernel_addr_r} ${tftp_server}:Image-sg2000 ; tftpboot ${fdt_addr_r} ${tftp_server}:jh7110-star64-pine64.dtb ; fdt addr ${fdt_addr_r} ; booti ${kernel_addr_r} ${ramdisk_addr_r}:${ramdisk_size} ${fdt_addr_r}
setenv tftp_server 192.168.31.10 ; dhcp ${kernel_addr_r} ${tftp_server}:Image-sg2000 ; tftpboot ${fdt_addr_r} ${tftp_server}:jh7110-star64-pine64.dtb ; fdt addr ${fdt_addr_r} ; $ booti ${kernel_addr_r} - ${fdt_addr_r}
```
NuttX boots a tiny bit, and prints `123` yay!
```bash
## Boot NuttX from RAM
$ booti ${kernel_addr_r} ${ramdisk_addr_r}:${ramdisk_size} ${fdt_addr_r}
$ booti ${kernel_addr_r} - ${fdt_addr_r}
## Flattened Device Tree blob at 81200000
Booting using the fdt blob at 0x81200000
@ -839,15 +845,26 @@ at file: machine/risc-v/arch_elf.c:494
task: AppBringUp process: Kernel 0x80200f34
```
Oops we goofed and used the wrong U-Boot Command. Watch what happens when we use the correct U-Boot Command...
Oops we goofed and used the wrong U-Boot Command...
```bash
## Nope! This won't work for NuttX. RAM Disk Address must be `-`!
setenv tftp_server 192.168.31.10 ; dhcp ${kernel_addr_r} ${tftp_server}:Image-sg2000 ;
tftpboot ${fdt_addr_r} ${tftp_server}:jh7110-star64-pine64.dtb ; fdt addr ${fdt_addr_r} ;
booti ${kernel_addr_r} ${ramdisk_addr_r}:${ramdisk_size} ${fdt_addr_r}
```
Which overwrites the NuttX Image in RAM. Watch what happens when we use the correct U-Boot Command...
# NuttX Kernel Boots OK on SG2000
Here's the correct U-Boot Command...
```bash
setenv tftp_server 192.168.31.10 ; dhcp ${kernel_addr_r} ${tftp_server}:Image-sg2000
tftpboot ${fdt_addr_r} ${tftp_server}:jh7110-star64-pine64.dtb ; fdt addr ${fdt_addr_r} ; booti ${kernel_addr_r} - ${fdt_addr_r}
## This works OK for NuttX. RAM Disk Address must be `-`!
setenv tftp_server 192.168.31.10 ; dhcp ${kernel_addr_r} ${tftp_server}:Image-sg2000 ;
tftpboot ${fdt_addr_r} ${tftp_server}:jh7110-star64-pine64.dtb ; fdt addr ${fdt_addr_r} ;
booti ${kernel_addr_r} - ${fdt_addr_r}
```
NuttX Kernel boots OK on SG2000 yay!