<commit_before>/*
 * Procedures for maintaining information about logical memory blocks.
 *
 * <NAME>, IBM Corp.	June 2001.
 * Copyright (C) 2001 <NAME>.
 *
 *      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.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/lmb.h>

#undef DEBUG

#ifdef DEBUG
#define DBG(fmt...) LMB_DBG(fmt)
#else
#define DBG(fmt...)
#endif

#define LMB_ALLOC_ANYWHERE	0

struct lmb lmb;

void lmb_dump_all(void)
{
#ifdef DEBUG
	unsigned long i;

	DBG("lmb_dump_all:\n");
	DBG("    memory.cnt		  = 0x%lx\n", lmb.memory.cnt);
	DBG("    memory.size		  = 0x%llx\n",
	    (unsigned long long)lmb.memory.size);
	for (i=0; i < lmb.memory.cnt ;i++) {
		DBG("    memory.region[0x%x].base       = 0x%llx\n",
		    i, (unsigned long long)lmb.memory.region[i].base);
		DBG("		      .size     = 0x%llx\n",
		    (unsigned long long)lmb.memory.region[i].size);
	}

	DBG("\n    reserved.cnt	  = 0x%lx\n", lmb.reserved.cnt);
	DBG("    reserved.size	  = 0x%lx\n", lmb.reserved.size);
	for (i=0; i < lmb.reserved.cnt ;i++) {
		DBG("    reserved.region[0x%x].base       = 0x%llx\n",
		    i, (unsigned long long)lmb.reserved.region[i].base);
		DBG("		      .size     = 0x%llx\n",
		    (unsigned long long)lmb.reserved.region[i].size);
	}
#endif /* DEBUG */
}

static unsigned long __init lmb_addrs_overlap(u64 base1,
		u64 size1, u64 base2, u64 size2)
{
	return ((base1 < (base2+size2)) && (base2 < (base1+size1)));
}

static long __init lmb_addrs_adjacent(u64 base1, u64 size1,
		u64 base2, u64 size2)
{
	if (base2 == base1 + size1)
		return 1;
	else if (base1 == base2 + size2)
		return -1;

	return 0;
}

static long __init lmb_regions_adjacent(struct lmb_region *rgn,
		unsigned long r1, unsigned long r2)
{
	u64 base1 = rgn->region[r1].base;
	u64 size1 = rgn->region[r1].size;
	u64 base2 = rgn->region[r2].base;
	u64 size2 = rgn->region[r2].size;

	return lmb_addrs_adjacent(base1, size1, base2, size2);
}

static void __init lmb_remove_region(struct lmb_region *rgn, unsigned long r)
{
	unsigned long i;

	for (i = r; i < rgn->cnt - 1; i++) {
		rgn->region[i].base = rgn->region[i + 1].base;
		rgn->region[i].size = rgn->region[i + 1].size;
	}
	rgn->cnt--;
}

/* Assumption: base addr of region 1 < base addr of region 2 */
static void __init lmb_coalesce_regions(struct lmb_region *rgn,
		unsigned long r1, unsigned long r2)
{
	rgn->region[r1].size += rgn->region[r2].size;
	lmb_remove_region(rgn, r2);
}

/* This routine called with relocation disabled. */
void __init lmb_init(void)
{
	/* Create a dummy zero size LMB which will get coalesced away later.
	 * This simplifies the lmb_add() code below...
	 */
	lmb.memory.region[0].base = 0;
	lmb.memory.region[0].size = 0;
	lmb.memory.cnt = 1;

	/* Ditto. */
	lmb.reserved.region[0].base = 0;
	lmb.reserved.region[0].size = 0;
	lmb.reserved.cnt = 1;
}

/* This routine may be called with relocation disabled. */
void __init lmb_analyze(void)
{
	int i;

	lmb.memory.size = 0;

	for (i = 0; i < lmb.memory.cnt; i++)
		lmb.memory.size += lmb.memory.region[i].size;
}

/* This routine called with relocation disabled. */
static long __init lmb_add_region(struct lmb_region *rgn, u64 base, u64 size)
{
	unsigned long coalesced = 0;
	long adjacent, i;

	if ((rgn->cnt == 1) && (rgn->region[0].size == 0)) {
		rgn->region[0].base = base;
		rgn->region[0].size = size;
		return 0;
	}

	/* First try and coalesce this LMB with another. */
	for (i=0; i < rgn->cnt; i++) {
		u64 rgnbase = rgn->region[i].base;
		u64 rgnsize = rgn->region[i].size;

		if ((rgnbase == base) && (rgnsize == size))
			/* Already have this region, so we're done */
			return 0;

		adjacent = lmb_addrs_adjacent(base,size,rgnbase,rgnsize);
		if ( adjacent > 0 ) {
			rgn->region[i].base -= size;
			rgn->region[i].size += size;
			coalesced++;
			break;
		}
		else if ( adjacent < 0 ) {
			rgn->region[i].size += size;
			coalesced++;
			break;
		}
	}

	if ((i < rgn->cnt-1) && lmb_regions_adjacent(rgn, i, i+1) ) {
		lmb_coalesce_regions(rgn, i, i+1);
		coalesced++;
	}

	if (coalesced)
		return coalesced;
	if (rgn->cnt >= MAX_LMB_REGIONS)
		return -1;

	/* Couldn't coalesce the LMB, so add it to the sorted table. */
	for (i = rgn->cnt-1; i >= 0; i--) {
		if (base < rgn->region[i].base) {
			rgn->region[i+1].base = rgn->region[i].base;
			rgn->region[i+1].size = rgn->region[i].size;
		} else {
			rgn->region[i+1].base = base;
			rgn->region[i+1].size = size;
			break;
		}
	}
	rgn->cnt++;

	return 0;
}

/* This routine may be called with relocation disabled. */
long __init lmb_add(u64 base, u64 size)
{
	struct lmb_region *_rgn = &(lmb.memory);

	/* On pSeries LPAR systems, the first LMB is our RMO region. */
	if (base == 0)
		lmb.rmo_size = size;
<commit_msg>[LMB]: Fix lmb_add_region if region should be added at the head<commit_after>/*
 * Procedures for maintaining information about logical memory blocks.
 *
 * <NAME>, IBM Corp.	June 2001.
 * Copyright (C) 2001 <NAME>.
 *
 *      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.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/lmb.h>

#undef DEBUG

#ifdef DEBUG
#define DBG(fmt...) LMB_DBG(fmt)
#else
#define DBG(fmt...)
#endif

#define LMB_ALLOC_ANYWHERE	0

struct lmb lmb;

void lmb_dump_all(void)
{
#ifdef DEBUG
	unsigned long i;

	DBG("lmb_dump_all:\n");
	DBG("    memory.cnt		  = 0x%lx\n", lmb.memory.cnt);
	DBG("    memory.size		  = 0x%llx\n",
	    (unsigned long long)lmb.memory.size);
	for (i=0; i < lmb.memory.cnt ;i++) {
		DBG("    memory.region[0x%x].base       = 0x%llx\n",
		    i, (unsigned long long)lmb.memory.region[i].base);
		DBG("		      .size     = 0x%llx\n",
		    (unsigned long long)lmb.memory.region[i].size);
	}

	DBG("\n    reserved.cnt	  = 0x%lx\n", lmb.reserved.cnt);
	DBG("    reserved.size	  = 0x%lx\n", lmb.reserved.size);
	for (i=0; i < lmb.reserved.cnt ;i++) {
		DBG("    reserved.region[0x%x].base       = 0x%llx\n",
		    i, (unsigned long long)lmb.reserved.region[i].base);
		DBG("		      .size     = 0x%llx\n",
		    (unsigned long long)lmb.reserved.region[i].size);
	}
#endif /* DEBUG */
}

static unsigned long __init lmb_addrs_overlap(u64 base1,
		u64 size1, u64 base2, u64 size2)
{
	return ((base1 < (base2+size2)) && (base2 < (base1+size1)));
}

static long __init lmb_addrs_adjacent(u64 base1, u64 size1,
		u64 base2, u64 size2)
{
	if (base2 == base1 + size1)
		return 1;
	else if (base1 == base2 + size2)
		return -1;

	return 0;
}

static long __init lmb_regions_adjacent(struct lmb_region *rgn,
		unsigned long r1, unsigned long r2)
{
	u64 base1 = rgn->region[r1].base;
	u64 size1 = rgn->region[r1].size;
	u64 base2 = rgn->region[r2].base;
	u64 size2 = rgn->region[r2].size;

	return lmb_addrs_adjacent(base1, size1, base2, size2);
}

static void __init lmb_remove_region(struct lmb_region *rgn, unsigned long r)
{
	unsigned long i;

	for (i = r; i < rgn->cnt - 1; i++) {
		rgn->region[i].base = rgn->region[i + 1].base;
		rgn->region[i].size = rgn->region[i + 1].size;
	}
	rgn->cnt--;
}

/* Assumption: base addr of region 1 < base addr of region 2 */
static void __init lmb_coalesce_regions(struct lmb_region *rgn,
		unsigned long r1, unsigned long r2)
{
	rgn->region[r1].size += rgn->region[r2].size;
	lmb_remove_region(rgn, r2);
}

/* This routine called with relocation disabled. */
void __init lmb_init(void)
{
	/* Create a dummy zero size LMB which will get coalesced away later.
	 * This simplifies the lmb_add() code below...
	 */
	lmb.memory.region[0].base = 0;
	lmb.memory.region[0].size = 0;
	lmb.memory.cnt = 1;

	/* Ditto. */
	lmb.reserved.region[0].base = 0;
	lmb.reserved.region[0].size = 0;
	lmb.reserved.cnt = 1;
}

/* This routine may be called with relocation disabled. */
void __init lmb_analyze(void)
{
	int i;

	lmb.memory.size = 0;

	for (i = 0; i < lmb.memory.cnt; i++)
		lmb.memory.size += lmb.memory.region[i].size;
}

/* This routine called with relocation disabled. */
static long __init lmb_add_region(struct lmb_region *rgn, u64 base, u64 size)
{
	unsigned long coalesced = 0;
	long adjacent, i;

	if ((rgn->cnt == 1) && (rgn->region[0].size == 0)) {
		rgn->region[0].base = base;
		rgn->region[0].size = size;
		return 0;
	}

	/* First try and coalesce this LMB with another. */
	for (i=0; i < rgn->cnt; i++) {
		u64 rgnbase = rgn->region[i].base;
		u64 rgnsize = rgn->region[i].size;

		if ((rgnbase == base) && (rgnsize == size))
			/* Already have this region, so we're done */
			return 0;

		adjacent = lmb_addrs_adjacent(base,size,rgnbase,rgnsize);
		if ( adjacent > 0 ) {
			rgn->region[i].base -= size;
			rgn->region[i].size += size;
			coalesced++;
			break;
		}
		else if ( adjacent < 0 ) {
			rgn->region[i].size += size;
			coalesced++;
			break;
		}
	}

	if ((i < rgn->cnt-1) && lmb_regions_adjacent(rgn, i, i+1) ) {
		lmb_coalesce_regions(rgn, i, i+1);
		coalesced++;
	}

	if (coalesced)
		return coalesced;
	if (rgn->cnt >= MAX_LMB_REGIONS)
		return -1;

	/* Couldn't coalesce the LMB, so add it to the sorted table. */
	for (i = rgn->cnt-1; i >= 0; i--) {
		if (base < rgn->region[i].base) {
			rgn->region[i+1].base = rgn->region[i].base;
			rgn->region[i+1].size = rgn->region[i].size;
		} else {
			rgn->region[i+1].base = base;
			rgn->region[i+1].size = size;
			break;
		}
	}

	if (base < rgn->region[0].base) {
		rgn->region[0].base = base;
		rgn->region[0].size = size;
	}
	rgn->cnt++;

	return 0;
}

/* This routine may be called with relocation disabled. */
long __init lmb_add(u64 base, u64 size)
{
	struct lmb_region *_rgn = &(lmb.memory);

	/* On pSeries LPAR systems, the first LMB is our RMO region. */
	if (base == 0)
		lmb.rmo_size = size;

{'fraction_non_alphanumeric': 0.16261533882329596, 'fraction_numerical': 0.028078182359361048, 'mean_word_length': 3.2246437552388936, 'pattern_counts': {'":': 0, '<': 38, '<?xml version=': 0, '>': 90, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '1809523', 'n_tokens_mistral': 4391, 'n_tokens_neox': 4020, 'n_words': 1033}