Hi everyone,
I try to write the dsp code, let remoteproc load it as firmware, then use
modprobe remoteproc
modprobe da8xx_remoteproc
modprobe virtio_rpmsg_bus
to run it.
After I trace the remoteproc_core.c, I guess I need write resource table for virtio device, but I cannot find any document.
I want to reference IPC 3.X code, but I am not familiar xdc and dsp code.
Could you give me some suggestion or about virtio queue communication?
The code I ref: henryomd.blogspot.tw/2015/02/zynq-amp-linux-on-cpu0-and-bare-metal.html
#define RAM_ADDR 0xc60000
typedef unsigned int u32;
typedef unsigned char u8;
#define offsetof(s,m) (u32)&(((s *)0)->m)
struct resource_table {//Just copied from linux/remoteproc.h
u32 ver;//Must be 1 for remoteproc module!
u32 num;
u32 reserved[2];
u32 offset[1];
};
enum fw_resource_type {
RSC_CARVEOUT = 0,
RSC_DEVMEM = 1,
RSC_TRACE = 2,
RSC_VDEV = 3,
RSC_MMU = 4,
RSC_LAST = 5,
};
struct fw_rsc_carveout {
u32 type;//from struct fw_rsc_hdr
u32 da;
u32 pa;
u32 len;
u32 flags;
u32 reserved;
u8 name[32];
};
const struct rproc_resource
{
struct resource_table base;
//u32 offset[4];
struct fw_rsc_carveout code_cout;
}
ti_ipc_remoteproc_rt __attribute__ ((section (".rtable"))) =
{
.base = { .ver = 1, .num = 1, .reserved = { 0, 0 },
.offset = { offsetof(struct rproc_resource, code_cout) },
},
.code_cout = {
//.type = RSC_CARVEOUT, .da = RAM_ADDR, .pa = RAM_ADDR, .len = 1<<19,
.type = RSC_VDEV, .da = RAM_ADDR, .pa = RAM_ADDR, .len = 1<<19,
.flags=0, .reserved=0, .name="CPU1CODE",
},
};
int main()
{
int a = ti_ipc_remoteproc_rt.base.offset; // if no use ti_ipc_remoteproc_rt, compile will optimize the variable (don't generate it)
volatile unsigned int *message;
message = (unsigned int *)0xc7000000;
*message = 0xabcdef98;
*(message + 1)= a;
while(1);
return 0;
}
my linker script:
/* =========================================================================*
* OMAPL138_DSP.cmd - Linker Command File for Linking OMAPL138 DSP Programs *
* *
* These linker options are for command line linking only. For IDE linking, *
* you should set your linker options in Project Properties. *
* -c Link Using C Conventions *
* -stack 0x1000 Software Stack Size *
* -heap 0x1000 Heap Area Size *
* =========================================================================*/
-stack 0x1000
-heap 0x1000
/* =========================================================================*
* Specify the System Memory Map *
* =========================================================================*/
MEMORY
{
entry_point: o = 0xc5182800 l = 0x00000080
L22: o = 0x11800080 l = 0x0003FF80
L1P: o = 0x11E00000 l = 0x00008000
L1D: o = 0x11F00000 l = 0x00008000
L2: o = 0xC5000000 l = 0x00100000
}
/* =========================================================================*
* Specify the Sections Allocation into Memory *
* =========================================================================*/
SECTIONS
{
.text:_c_int00 > entry_point
.cinit > L2 /* Initialization Tables */
.pinit > L2 /* C++ Constructor Tables */
.const > L2 /* Constant Data */
.switch > L2 /* Jump Tables */
.text > L2 /* Executable Code */
.bss > L2 /* Global & Static Variables */
.far > L2 /* Far Global & Static Variables */
.stack > L2 /* Software System Stack */
.sysmem > L2 /* Dynamic Memory Allocation Area */
.cio > L2 /* C I/O Buffer */
.vecs > L2 /* Interrupt Vectors */
.data > L2
.args > L2
.ppinfo > L2
.ppdata > L2
/* EABI Sections */
.binit > L2
.init_array > L2
.neardata > L2
.fardata > L2
.rodata > L2
.c6xabi.exidx > L2
.c6xabi.extab > L2
.resource_table : {
__rtable_start = .;
*(.rtable)
__rtable_end = .;
} > L2
}
