|
@@ -8,7 +8,11 @@
|
|
|
|
|
|
#include <linux/init.h>
|
|
|
#include <linux/bootmem.h>
|
|
|
+#include <linux/smp.h>
|
|
|
#include <asm/bootinfo.h>
|
|
|
+#include <asm/bmips.h>
|
|
|
+#include <asm/smp-ops.h>
|
|
|
+#include <asm/mipsregs.h>
|
|
|
#include <bcm63xx_board.h>
|
|
|
#include <bcm63xx_cpu.h>
|
|
|
#include <bcm63xx_io.h>
|
|
@@ -54,6 +58,43 @@ void __init prom_init(void)
|
|
|
|
|
|
/* do low level board init */
|
|
|
board_prom_init();
|
|
|
+
|
|
|
+ if (IS_ENABLED(CONFIG_CPU_BMIPS4350) && IS_ENABLED(CONFIG_SMP)) {
|
|
|
+ /* set up SMP */
|
|
|
+ register_smp_ops(&bmips_smp_ops);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * BCM6328 might not have its second CPU enabled, while BCM6358
|
|
|
+ * needs special handling for its shared TLB, so disable SMP
|
|
|
+ * for now.
|
|
|
+ */
|
|
|
+ if (BCMCPU_IS_6328()) {
|
|
|
+ bmips_smp_enabled = 0;
|
|
|
+ } else if (BCMCPU_IS_6358()) {
|
|
|
+ bmips_smp_enabled = 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!bmips_smp_enabled)
|
|
|
+ return;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * The bootloader has set up the CPU1 reset vector at
|
|
|
+ * 0xa000_0200.
|
|
|
+ * This conflicts with the special interrupt vector (IV).
|
|
|
+ * The bootloader has also set up CPU1 to respond to the wrong
|
|
|
+ * IPI interrupt.
|
|
|
+ * Here we will start up CPU1 in the background and ask it to
|
|
|
+ * reconfigure itself then go back to sleep.
|
|
|
+ */
|
|
|
+ memcpy((void *)0xa0000200, &bmips_smp_movevec, 0x20);
|
|
|
+ __sync();
|
|
|
+ set_c0_cause(C_SW0);
|
|
|
+ cpumask_set_cpu(1, &bmips_booted_mask);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * FIXME: we really should have some sort of hazard barrier here
|
|
|
+ */
|
|
|
+ }
|
|
|
}
|
|
|
|
|
|
void __init prom_free_prom_memory(void)
|