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PPC: e500: allow users to set the /compatible property via -machine

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Device trees usually have a node /compatible, which indicate which machine
type we're looking at. For quick prototyping, it can be very useful to change
the contents of that node via the command line.

Thus, introduce a new option to -machine called dt_compatible, which when
set changes the /compatible contents to its value.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2012-06-20 20:46:22 +02:00
parent 45e9dfb2fd
commit caedc737d2
2 changed files with 13 additions and 3 deletions
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12
hw/ppce500_mpc8544ds.c
View File

@ -119,7 +119,8 @@ static int mpc8544_load_device_tree(CPUPPCState *env,
uint32_t clock_freq = 400000000;
uint32_t tb_freq = 400000000;
int i;
char compatible[] = "MPC8544DS\0MPC85xxDS";
const char *compatible = "MPC8544DS\0MPC85xxDS";
int compatible_len = sizeof("MPC8544DS\0MPC85xxDS");
char compatible_sb[] = "fsl,mpc8544-immr\0simple-bus";
char model[] = "MPC8544DS";
char soc[128];
@ -144,8 +145,14 @@ static int mpc8544_load_device_tree(CPUPPCState *env,
machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
if (machine_opts) {
const char *tmp;
dumpdtb = qemu_opt_get(machine_opts, "dumpdtb");
dtb_file = qemu_opt_get(machine_opts, "dtb");
tmp = qemu_opt_get(machine_opts, "dt_compatible");
if (tmp) {
compatible = tmp;
compatible_len = strlen(compatible) + 1;
}
}
if (dtb_file) {
@ -169,8 +176,7 @@ static int mpc8544_load_device_tree(CPUPPCState *env,
/* Manipulate device tree in memory. */
qemu_devtree_setprop_string(fdt, "/", "model", model);
qemu_devtree_setprop(fdt, "/", "compatible", compatible,
sizeof(compatible));
qemu_devtree_setprop(fdt, "/", "compatible", compatible, compatible_len);
qemu_devtree_setprop_cell(fdt, "/", "#address-cells", 2);
qemu_devtree_setprop_cell(fdt, "/", "#size-cells", 2);

4
qemu-config.c
View File

@ -591,6 +591,10 @@ static QemuOptsList qemu_machine_opts = {
.name = "phandle_start",
.type = QEMU_OPT_STRING,
.help = "The first phandle ID we may generate dynamically",
}, {
.name = "dt_compatible",
.type = QEMU_OPT_STRING,
.help = "Overrides the \"compatible\" property of the dt root node",
},
{ /* End of list */ }
},