powerpc: move pSeries files to arch/powerpc/platforms/pseries

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 517 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
new file mode 100644
index 000000000000..268d8362dde7
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -0,0 +1,517 @@
+/*
+ * pSeries_lpar.c
+ * Copyright (C) 2001 Todd Inglett, IBM Corporation
+ *
+ * pSeries LPAR support.
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#define DEBUG
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/dma-mapping.h>
+#include <asm/processor.h>
+#include <asm/mmu.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/machdep.h>
+#include <asm/abs_addr.h>
+#include <asm/mmu_context.h>
+#include <asm/ppcdebug.h>
+#include <asm/iommu.h>
+#include <asm/tlbflush.h>
+#include <asm/tlb.h>
+#include <asm/prom.h>
+#include <asm/abs_addr.h>
+#include <asm/cputable.h>
+#include <asm/plpar_wrappers.h>
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+/* in pSeries_hvCall.S */
+EXPORT_SYMBOL(plpar_hcall);
+EXPORT_SYMBOL(plpar_hcall_4out);
+EXPORT_SYMBOL(plpar_hcall_norets);
+EXPORT_SYMBOL(plpar_hcall_8arg_2ret);
+
+extern void pSeries_find_serial_port(void);
+
+
+int vtermno;	/* virtual terminal# for udbg  */
+
+#define __ALIGNED__ __attribute__((__aligned__(sizeof(long))))
+static void udbg_hvsi_putc(unsigned char c)
+{
+	/* packet's seqno isn't used anyways */
+	uint8_t packet[] __ALIGNED__ = { 0xff, 5, 0, 0, c };
+	int rc;
+
+	if (c == '\n')
+		udbg_hvsi_putc('\r');
+
+	do {
+		rc = plpar_put_term_char(vtermno, sizeof(packet), packet);
+	} while (rc == H_Busy);
+}
+
+static long hvsi_udbg_buf_len;
+static uint8_t hvsi_udbg_buf[256];
+
+static int udbg_hvsi_getc_poll(void)
+{
+	unsigned char ch;
+	int rc, i;
+
+	if (hvsi_udbg_buf_len == 0) {
+		rc = plpar_get_term_char(vtermno, &hvsi_udbg_buf_len, hvsi_udbg_buf);
+		if (rc != H_Success || hvsi_udbg_buf[0] != 0xff) {
+			/* bad read or non-data packet */
+			hvsi_udbg_buf_len = 0;
+		} else {
+			/* remove the packet header */
+			for (i = 4; i < hvsi_udbg_buf_len; i++)
+				hvsi_udbg_buf[i-4] = hvsi_udbg_buf[i];
+			hvsi_udbg_buf_len -= 4;
+		}
+	}
+
+	if (hvsi_udbg_buf_len <= 0 || hvsi_udbg_buf_len > 256) {
+		/* no data ready */
+		hvsi_udbg_buf_len = 0;
+		return -1;
+	}
+
+	ch = hvsi_udbg_buf[0];
+	/* shift remaining data down */
+	for (i = 1; i < hvsi_udbg_buf_len; i++) {
+		hvsi_udbg_buf[i-1] = hvsi_udbg_buf[i];
+	}
+	hvsi_udbg_buf_len--;
+
+	return ch;
+}
+
+static unsigned char udbg_hvsi_getc(void)
+{
+	int ch;
+	for (;;) {
+		ch = udbg_hvsi_getc_poll();
+		if (ch == -1) {
+			/* This shouldn't be needed...but... */
+			volatile unsigned long delay;
+			for (delay=0; delay < 2000000; delay++)
+				;
+		} else {
+			return ch;
+		}
+	}
+}
+
+static void udbg_putcLP(unsigned char c)
+{
+	char buf[16];
+	unsigned long rc;
+
+	if (c == '\n')
+		udbg_putcLP('\r');
+
+	buf[0] = c;
+	do {
+		rc = plpar_put_term_char(vtermno, 1, buf);
+	} while(rc == H_Busy);
+}
+
+/* Buffered chars getc */
+static long inbuflen;
+static long inbuf[2];	/* must be 2 longs */
+
+static int udbg_getc_pollLP(void)
+{
+	/* The interface is tricky because it may return up to 16 chars.
+	 * We save them statically for future calls to udbg_getc().
+	 */
+	char ch, *buf = (char *)inbuf;
+	int i;
+	long rc;
+	if (inbuflen == 0) {
+		/* get some more chars. */
+		inbuflen = 0;
+		rc = plpar_get_term_char(vtermno, &inbuflen, buf);
+		if (rc != H_Success)
+			inbuflen = 0;	/* otherwise inbuflen is garbage */
+	}
+	if (inbuflen <= 0 || inbuflen > 16) {
+		/* Catch error case as well as other oddities (corruption) */
+		inbuflen = 0;
+		return -1;
+	}
+	ch = buf[0];
+	for (i = 1; i < inbuflen; i++)	/* shuffle them down. */
+		buf[i-1] = buf[i];
+	inbuflen--;
+	return ch;
+}
+
+static unsigned char udbg_getcLP(void)
+{
+	int ch;
+	for (;;) {
+		ch = udbg_getc_pollLP();
+		if (ch == -1) {
+			/* This shouldn't be needed...but... */
+			volatile unsigned long delay;
+			for (delay=0; delay < 2000000; delay++)
+				;
+		} else {
+			return ch;
+		}
+	}
+}
+
+/* call this from early_init() for a working debug console on
+ * vterm capable LPAR machines
+ */
+void udbg_init_debug_lpar(void)
+{
+	vtermno = 0;
+	udbg_putc = udbg_putcLP;
+	udbg_getc = udbg_getcLP;
+	udbg_getc_poll = udbg_getc_pollLP;
+}
+
+/* returns 0 if couldn't find or use /chosen/stdout as console */
+int find_udbg_vterm(void)
+{
+	struct device_node *stdout_node;
+	u32 *termno;
+	char *name;
+	int found = 0;
+
+	/* find the boot console from /chosen/stdout */
+	if (!of_chosen)
+		return 0;
+	name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
+	if (name == NULL)
+		return 0;
+	stdout_node = of_find_node_by_path(name);
+	if (!stdout_node)
+		return 0;
+
+	/* now we have the stdout node; figure out what type of device it is. */
+	name = (char *)get_property(stdout_node, "name", NULL);
+	if (!name) {
+		printk(KERN_WARNING "stdout node missing 'name' property!\n");
+		goto out;
+	}
+
+	if (strncmp(name, "vty", 3) == 0) {
+		if (device_is_compatible(stdout_node, "hvterm1")) {
+			termno = (u32 *)get_property(stdout_node, "reg", NULL);
+			if (termno) {
+				vtermno = termno[0];
+				udbg_putc = udbg_putcLP;
+				udbg_getc = udbg_getcLP;
+				udbg_getc_poll = udbg_getc_pollLP;
+				found = 1;
+			}
+		} else if (device_is_compatible(stdout_node, "hvterm-protocol")) {
+			termno = (u32 *)get_property(stdout_node, "reg", NULL);
+			if (termno) {
+				vtermno = termno[0];
+				udbg_putc = udbg_hvsi_putc;
+				udbg_getc = udbg_hvsi_getc;
+				udbg_getc_poll = udbg_hvsi_getc_poll;
+				found = 1;
+			}
+		}
+	} else if (strncmp(name, "serial", 6)) {
+		/* XXX fix ISA serial console */
+		printk(KERN_WARNING "serial stdout on LPAR ('%s')! "
+				"can't print udbg messages\n",
+		       stdout_node->full_name);
+	} else {
+		printk(KERN_WARNING "don't know how to print to stdout '%s'\n",
+		       stdout_node->full_name);
+	}
+
+out:
+	of_node_put(stdout_node);
+	return found;
+}
+
+void vpa_init(int cpu)
+{
+	int hwcpu = get_hard_smp_processor_id(cpu);
+	unsigned long vpa = (unsigned long)&(paca[cpu].lppaca);
+	long ret;
+	unsigned long flags;
+
+	/* Register the Virtual Processor Area (VPA) */
+	flags = 1UL << (63 - 18);
+
+	if (cpu_has_feature(CPU_FTR_ALTIVEC))
+		paca[cpu].lppaca.vmxregs_in_use = 1;
+
+	ret = register_vpa(flags, hwcpu, __pa(vpa));
+
+	if (ret)
+		printk(KERN_ERR "WARNING: vpa_init: VPA registration for "
+				"cpu %d (hw %d) of area %lx returns %ld\n",
+				cpu, hwcpu, __pa(vpa), ret);
+}
+
+long pSeries_lpar_hpte_insert(unsigned long hpte_group,
+			      unsigned long va, unsigned long prpn,
+			      unsigned long vflags, unsigned long rflags)
+{
+	unsigned long lpar_rc;
+	unsigned long flags;
+	unsigned long slot;
+	unsigned long hpte_v, hpte_r;
+	unsigned long dummy0, dummy1;
+
+	hpte_v = ((va >> 23) << HPTE_V_AVPN_SHIFT) | vflags | HPTE_V_VALID;
+	if (vflags & HPTE_V_LARGE)
+		hpte_v &= ~(1UL << HPTE_V_AVPN_SHIFT);
+
+	hpte_r = (prpn << HPTE_R_RPN_SHIFT) | rflags;
+
+	/* Now fill in the actual HPTE */
+	/* Set CEC cookie to 0         */
+	/* Zero page = 0               */
+	/* I-cache Invalidate = 0      */
+	/* I-cache synchronize = 0     */
+	/* Exact = 0                   */
+	flags = 0;
+
+	/* XXX why is this here? - Anton */
+	if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE))
+		hpte_r &= ~_PAGE_COHERENT;
+
+	lpar_rc = plpar_hcall(H_ENTER, flags, hpte_group, hpte_v,
+			      hpte_r, &slot, &dummy0, &dummy1);
+
+	if (unlikely(lpar_rc == H_PTEG_Full))
+		return -1;
+
+	/*
+	 * Since we try and ioremap PHBs we don't own, the pte insert
+	 * will fail. However we must catch the failure in hash_page
+	 * or we will loop forever, so return -2 in this case.
+	 */
+	if (unlikely(lpar_rc != H_Success))
+		return -2;
+
+	/* Because of iSeries, we have to pass down the secondary
+	 * bucket bit here as well
+	 */
+	return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3);
+}
+
+static DEFINE_SPINLOCK(pSeries_lpar_tlbie_lock);
+
+static long pSeries_lpar_hpte_remove(unsigned long hpte_group)
+{
+	unsigned long slot_offset;
+	unsigned long lpar_rc;
+	int i;
+	unsigned long dummy1, dummy2;
+
+	/* pick a random slot to start at */
+	slot_offset = mftb() & 0x7;
+
+	for (i = 0; i < HPTES_PER_GROUP; i++) {
+
+		/* don't remove a bolted entry */
+		lpar_rc = plpar_pte_remove(H_ANDCOND, hpte_group + slot_offset,
+					   (0x1UL << 4), &dummy1, &dummy2);
+
+		if (lpar_rc == H_Success)
+			return i;
+
+		BUG_ON(lpar_rc != H_Not_Found);
+
+		slot_offset++;
+		slot_offset &= 0x7;
+	}
+
+	return -1;
+}
+
+static void pSeries_lpar_hptab_clear(void)
+{
+	unsigned long size_bytes = 1UL << ppc64_pft_size;
+	unsigned long hpte_count = size_bytes >> 4;
+	unsigned long dummy1, dummy2;
+	int i;
+
+	/* TODO: Use bulk call */
+	for (i = 0; i < hpte_count; i++)
+		plpar_pte_remove(0, i, 0, &dummy1, &dummy2);
+}
+
+/*
+ * NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
+ * the low 3 bits of flags happen to line up.  So no transform is needed.
+ * We can probably optimize here and assume the high bits of newpp are
+ * already zero.  For now I am paranoid.
+ */
+static long pSeries_lpar_hpte_updatepp(unsigned long slot, unsigned long newpp,
+				       unsigned long va, int large, int local)
+{
+	unsigned long lpar_rc;
+	unsigned long flags = (newpp & 7) | H_AVPN;
+	unsigned long avpn = va >> 23;
+
+	if (large)
+		avpn &= ~0x1UL;
+
+	lpar_rc = plpar_pte_protect(flags, slot, (avpn << 7));
+
+	if (lpar_rc == H_Not_Found)
+		return -1;
+
+	BUG_ON(lpar_rc != H_Success);
+
+	return 0;
+}
+
+static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot)
+{
+	unsigned long dword0;
+	unsigned long lpar_rc;
+	unsigned long dummy_word1;
+	unsigned long flags;
+
+	/* Read 1 pte at a time                        */
+	/* Do not need RPN to logical page translation */
+	/* No cross CEC PFT access                     */
+	flags = 0;
+
+	lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1);
+
+	BUG_ON(lpar_rc != H_Success);
+
+	return dword0;
+}
+
+static long pSeries_lpar_hpte_find(unsigned long vpn)
+{
+	unsigned long hash;
+	unsigned long i, j;
+	long slot;
+	unsigned long hpte_v;
+
+	hash = hpt_hash(vpn, 0);
+
+	for (j = 0; j < 2; j++) {
+		slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
+		for (i = 0; i < HPTES_PER_GROUP; i++) {
+			hpte_v = pSeries_lpar_hpte_getword0(slot);
+
+			if ((HPTE_V_AVPN_VAL(hpte_v) == (vpn >> 11))
+			    && (hpte_v & HPTE_V_VALID)
+			    && (!!(hpte_v & HPTE_V_SECONDARY) == j)) {
+				/* HPTE matches */
+				if (j)
+					slot = -slot;
+				return slot;
+			}
+			++slot;
+		}
+		hash = ~hash;
+	}
+
+	return -1;
+} 
+
+static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp,
+					     unsigned long ea)
+{
+	unsigned long lpar_rc;
+	unsigned long vsid, va, vpn, flags;
+	long slot;
+
+	vsid = get_kernel_vsid(ea);
+	va = (vsid << 28) | (ea & 0x0fffffff);
+	vpn = va >> PAGE_SHIFT;
+
+	slot = pSeries_lpar_hpte_find(vpn);
+	BUG_ON(slot == -1);
+
+	flags = newpp & 7;
+	lpar_rc = plpar_pte_protect(flags, slot, 0);
+
+	BUG_ON(lpar_rc != H_Success);
+}
+
+static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
+					 int large, int local)
+{
+	unsigned long avpn = va >> 23;
+	unsigned long lpar_rc;
+	unsigned long dummy1, dummy2;
+
+	if (large)
+		avpn &= ~0x1UL;
+
+	lpar_rc = plpar_pte_remove(H_AVPN, slot, (avpn << 7), &dummy1,
+				   &dummy2);
+
+	if (lpar_rc == H_Not_Found)
+		return;
+
+	BUG_ON(lpar_rc != H_Success);
+}
+
+/*
+ * Take a spinlock around flushes to avoid bouncing the hypervisor tlbie
+ * lock.
+ */
+void pSeries_lpar_flush_hash_range(unsigned long number, int local)
+{
+	int i;
+	unsigned long flags = 0;
+	struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
+	int lock_tlbie = !cpu_has_feature(CPU_FTR_LOCKLESS_TLBIE);
+
+	if (lock_tlbie)
+		spin_lock_irqsave(&pSeries_lpar_tlbie_lock, flags);
+
+	for (i = 0; i < number; i++)
+		flush_hash_page(batch->vaddr[i], batch->pte[i], local);
+
+	if (lock_tlbie)
+		spin_unlock_irqrestore(&pSeries_lpar_tlbie_lock, flags);
+}
+
+void hpte_init_lpar(void)
+{
+	ppc_md.hpte_invalidate	= pSeries_lpar_hpte_invalidate;
+	ppc_md.hpte_updatepp	= pSeries_lpar_hpte_updatepp;
+	ppc_md.hpte_updateboltedpp = pSeries_lpar_hpte_updateboltedpp;
+	ppc_md.hpte_insert	= pSeries_lpar_hpte_insert;
+	ppc_md.hpte_remove	= pSeries_lpar_hpte_remove;
+	ppc_md.flush_hash_range	= pSeries_lpar_flush_hash_range;
+	ppc_md.hpte_clear_all   = pSeries_lpar_hptab_clear;
+
+	htab_finish_init();
+}