Dear sir,
I wanted to know how to write my own config files about non-root cell. By the
way, I tried to alter the
rpi4-linux-demo.c and compiled it. Of course, it was successful in that way.
1. But I don't understand why there are several memory regions definitions.
2. How to know the memory addresses.
3. How many memory regions should be defined.
Whether should I reference the Raspberry Pi 4 model B's manual to resolve three
questions.
Here is the part of rpi4-linux-demo.c about memory definitions.(I didn't why
there are 5 memory regions, 2 RAM definitions).
.mem_regions = {
/* IVSHMEM shared memory regions (demo) */
{
.phys_start = 0x3faf0000,
.virt_start = 0x3faf0000,
.size = 0x1000,
.flags = JAILHOUSE_MEM_READ | JAILHOUSE_MEM_ROOTSHARED,
},
{
.phys_start = 0x3faf1000,
.virt_start = 0x3faf1000,
.size = 0x9000,
.flags = JAILHOUSE_MEM_READ | JAILHOUSE_MEM_WRITE |
JAILHOUSE_MEM_ROOTSHARED,
},
{
.phys_start = 0x3fafa000,
.virt_start = 0x3fafa000,
.size = 0x2000,
.flags = JAILHOUSE_MEM_READ | JAILHOUSE_MEM_ROOTSHARED,
},
{
.phys_start = 0x3fafc000,
.virt_start = 0x3fafc000,
.size = 0x2000,
.flags = JAILHOUSE_MEM_READ | JAILHOUSE_MEM_ROOTSHARED,
},
{
.phys_start = 0x3fafe000,
.virt_start = 0x3fafe000,
.size = 0x2000,
.flags = JAILHOUSE_MEM_READ | JAILHOUSE_MEM_WRITE |
JAILHOUSE_MEM_ROOTSHARED,
},
/* IVSHMEM shared memory region */
JAILHOUSE_SHMEM_NET_REGIONS(0x3fb00000, 1),
/* UART */ {
.phys_start = 0xfe215040,
.virt_start = 0xfe215040,
.size = 0x40,
.flags = JAILHOUSE_MEM_READ | JAILHOUSE_MEM_WRITE |
JAILHOUSE_MEM_IO | JAILHOUSE_MEM_IO_8 |
JAILHOUSE_MEM_IO_32 | JAILHOUSE_MEM_ROOTSHARED,
},
/* RAM */ {
.phys_start = 0x3f900000,
.virt_start = 0,
.size = 0x10000,
.flags = JAILHOUSE_MEM_READ | JAILHOUSE_MEM_WRITE |
JAILHOUSE_MEM_EXECUTE | JAILHOUSE_MEM_LOADABLE,
},
/* RAM */ {
.phys_start = 0x30000000,
.virt_start = 0x30000000,
.size = 0x8000000,
.flags = JAILHOUSE_MEM_READ | JAILHOUSE_MEM_WRITE |
JAILHOUSE_MEM_EXECUTE | JAILHOUSE_MEM_DMA |
JAILHOUSE_MEM_LOADABLE,
},
/* communication region */ {
.virt_start = 0x80000000,
.size = 0x00001000,
.flags = JAILHOUSE_MEM_READ | JAILHOUSE_MEM_WRITE |
JAILHOUSE_MEM_COMM_REGION,
},
}
By the way, what information should I obtained so that I can write my own cell
config.
If I can get your generous help, I will appreciate.
Thank you again !
Yours sincerely,
Hongpeng Cao.
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